/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/seq-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:42:39,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:42:39,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:42:39,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 09:42:39,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 09:42:39,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 09:42:39,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 09:42:39,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 09:42:39,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 09:42:39,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 09:42:39,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 09:42:39,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 09:42:39,683 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 09:42:39,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 09:42:39,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 09:42:39,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 09:42:39,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 09:42:39,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 09:42:39,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:42:39,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:42:39,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:42:39,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:42:39,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:42:39,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:42:39,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:42:39,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:42:39,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:42:39,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:42:39,719 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:42:39,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:42:39,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:42:39,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:42:39,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:42:39,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:42:39,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:42:39,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:42:39,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:42:39,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:42:39,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:42:39,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:42:39,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:42:39,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:42:39,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:42:39,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:42:39,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:42:39,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:42:39,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:42:39,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:42:39,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:42:39,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:42:39,722 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:42:39,723 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:42:39,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:42:39,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:42:39,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:42:39,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:42:39,931 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:42:39,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq-3.i [2022-04-06 09:42:39,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef574e40/7d788b1500f04db0b68d3c01194059be/FLAG1115741f1 [2022-04-06 09:42:40,322 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:42:40,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i [2022-04-06 09:42:40,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef574e40/7d788b1500f04db0b68d3c01194059be/FLAG1115741f1 [2022-04-06 09:42:40,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef574e40/7d788b1500f04db0b68d3c01194059be [2022-04-06 09:42:40,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:42:40,343 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:42:40,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:42:40,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:42:40,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:42:40,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2845ba2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40, skipping insertion in model container [2022-04-06 09:42:40,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:42:40,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:42:40,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-04-06 09:42:40,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:42:40,528 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:42:40,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-04-06 09:42:40,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:42:40,547 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:42:40,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40 WrapperNode [2022-04-06 09:42:40,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:42:40,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:42:40,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:42:40,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:42:40,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:42:40,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:42:40,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:42:40,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:42:40,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:42:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:40,605 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) [2022-04-06 09:42:40,619 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 [2022-04-06 09:42:40,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:42:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:42:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:42:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 09:42:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 09:42:40,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:42:40,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:42:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:42:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 09:42:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 09:42:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:42:40,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:42:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 09:42:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:42:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:42:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:42:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:42:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:42:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:42:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:42:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:42:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:42:40,713 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:42:40,714 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:42:40,790 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:42:40,793 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:42:40,794 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 09:42:40,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:42:40 BoogieIcfgContainer [2022-04-06 09:42:40,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:42:40,795 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:42:40,795 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:42:40,796 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:42:40,798 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:42:40" (1/1) ... [2022-04-06 09:42:40,799 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:42:40,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:42:40 BasicIcfg [2022-04-06 09:42:40,809 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:42:40,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:42:40,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:42:40,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:42:40,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:42:40" (1/4) ... [2022-04-06 09:42:40,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c006d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:42:40, skipping insertion in model container [2022-04-06 09:42:40,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:42:40" (2/4) ... [2022-04-06 09:42:40,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c006d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:42:40, skipping insertion in model container [2022-04-06 09:42:40,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:42:40" (3/4) ... [2022-04-06 09:42:40,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c006d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:42:40, skipping insertion in model container [2022-04-06 09:42:40,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:42:40" (4/4) ... [2022-04-06 09:42:40,814 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.iqvasr [2022-04-06 09:42:40,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:42:40,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:42:40,874 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:42:40,878 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 09:42:40,878 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:42:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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) [2022-04-06 09:42:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 09:42:40,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:40,891 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:40,891 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1622270520, now seen corresponding path program 1 times [2022-04-06 09:42:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:40,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903304206] [2022-04-06 09:42:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:40,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:41,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:41,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903304206] [2022-04-06 09:42:41,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903304206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:42:41,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:42:41,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 09:42:41,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874146441] [2022-04-06 09:42:41,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:42:41,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 09:42:41,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 09:42:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:42:41,084 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:42:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:41,116 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2022-04-06 09:42:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 09:42:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 09:42:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:41,124 INFO L225 Difference]: With dead ends: 41 [2022-04-06 09:42:41,124 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 09:42:41,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:42:41,132 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:41,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:42:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 09:42:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 09:42:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:42:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-04-06 09:42:41,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-04-06 09:42:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:41,154 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-04-06 09:42:41,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:42:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-04-06 09:42:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 09:42:41,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:41,155 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:41,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:42:41,156 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1752745994, now seen corresponding path program 1 times [2022-04-06 09:42:41,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:41,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643267682] [2022-04-06 09:42:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:41,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:41,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643267682] [2022-04-06 09:42:41,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643267682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:42:41,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:42:41,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 09:42:41,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87742722] [2022-04-06 09:42:41,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:42:41,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 09:42:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 09:42:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-04-06 09:42:41,240 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:42:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:41,339 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-04-06 09:42:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 09:42:41,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 09:42:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:41,341 INFO L225 Difference]: With dead ends: 40 [2022-04-06 09:42:41,341 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 09:42:41,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-04-06 09:42:41,342 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:41,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:42:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 09:42:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-04-06 09:42:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:42:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-06 09:42:41,349 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-04-06 09:42:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:41,349 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-06 09:42:41,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:42:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-06 09:42:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 09:42:41,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:41,350 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:41,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 09:42:41,350 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:41,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1618517526, now seen corresponding path program 1 times [2022-04-06 09:42:41,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:41,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947152437] [2022-04-06 09:42:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:41,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:41,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947152437] [2022-04-06 09:42:41,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947152437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:41,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150759123] [2022-04-06 09:42:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:41,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:41,415 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) [2022-04-06 09:42:41,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 09:42:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 09:42:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:41,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 09:42:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150759123] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:42:41,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 09:42:41,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-04-06 09:42:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512110837] [2022-04-06 09:42:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:42:41,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:42:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:42:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:42:41,554 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:42:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:41,592 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-04-06 09:42:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 09:42:41,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 09:42:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:41,593 INFO L225 Difference]: With dead ends: 36 [2022-04-06 09:42:41,593 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 09:42:41,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 09:42:41,594 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:41,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:42:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 09:42:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-04-06 09:42:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:42:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-06 09:42:41,599 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2022-04-06 09:42:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:41,599 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-06 09:42:41,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:42:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-06 09:42:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 09:42:41,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:41,600 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:41,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 09:42:41,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:41,819 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:41,819 INFO L85 PathProgramCache]: Analyzing trace with hash 760418478, now seen corresponding path program 1 times [2022-04-06 09:42:41,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:41,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062423560] [2022-04-06 09:42:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 09:42:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:41,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062423560] [2022-04-06 09:42:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062423560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514762993] [2022-04-06 09:42:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:41,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:41,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:41,896 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) [2022-04-06 09:42:41,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 09:42:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:41,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 09:42:41,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:42,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:42,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514762993] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:42,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:42,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 09:42:42,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218177508] [2022-04-06 09:42:42,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:42,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 09:42:42,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 09:42:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 09:42:42,109 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:42,275 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-04-06 09:42:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 09:42:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-04-06 09:42:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:42,277 INFO L225 Difference]: With dead ends: 52 [2022-04-06 09:42:42,277 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 09:42:42,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-04-06 09:42:42,278 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:42,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 58 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 09:42:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-04-06 09:42:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:42:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-06 09:42:42,283 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 25 [2022-04-06 09:42:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:42,283 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-06 09:42:42,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-06 09:42:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 09:42:42,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:42,284 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:42,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:42,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 09:42:42,499 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1387858898, now seen corresponding path program 1 times [2022-04-06 09:42:42,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:42,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615560054] [2022-04-06 09:42:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:42,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:42,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 09:42:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:42,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:42,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615560054] [2022-04-06 09:42:42,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615560054] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:42,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301269468] [2022-04-06 09:42:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:42,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:42,574 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) [2022-04-06 09:42:42,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 09:42:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 09:42:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:42,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:42,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301269468] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:42,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:42,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-04-06 09:42:42,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706619265] [2022-04-06 09:42:42,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:42,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 09:42:42,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 09:42:42,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-04-06 09:42:42,756 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:42,981 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-04-06 09:42:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 09:42:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-04-06 09:42:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:42,982 INFO L225 Difference]: With dead ends: 62 [2022-04-06 09:42:42,982 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 09:42:42,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-04-06 09:42:42,983 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:42,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 82 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 09:42:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-04-06 09:42:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:42:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-06 09:42:42,989 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2022-04-06 09:42:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:42,989 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-06 09:42:42,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-06 09:42:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 09:42:42,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:42,990 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:43,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 09:42:43,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:43,202 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:43,203 INFO L85 PathProgramCache]: Analyzing trace with hash 412732046, now seen corresponding path program 2 times [2022-04-06 09:42:43,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:43,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455655876] [2022-04-06 09:42:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:43,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:43,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:43,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:42:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:43,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:43,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455655876] [2022-04-06 09:42:43,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455655876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:43,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648603935] [2022-04-06 09:42:43,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:42:43,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:43,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:43,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:43,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 09:42:43,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:42:43,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:43,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 09:42:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:43,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:42:43,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648603935] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:43,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:43,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-04-06 09:42:43,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350328133] [2022-04-06 09:42:43,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:43,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 09:42:43,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:43,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 09:42:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 09:42:43,438 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:42:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:43,565 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-04-06 09:42:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 09:42:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-06 09:42:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:43,566 INFO L225 Difference]: With dead ends: 46 [2022-04-06 09:42:43,566 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 09:42:43,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-04-06 09:42:43,567 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:43,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 48 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 09:42:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-04-06 09:42:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-04-06 09:42:43,572 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2022-04-06 09:42:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:43,572 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-04-06 09:42:43,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:42:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-04-06 09:42:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 09:42:43,573 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:43,573 INFO L499 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] [2022-04-06 09:42:43,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:43,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:43,790 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1032034422, now seen corresponding path program 3 times [2022-04-06 09:42:43,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:43,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035146927] [2022-04-06 09:42:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:43,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:42:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:43,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:42:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:43,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:43,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035146927] [2022-04-06 09:42:43,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035146927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830163972] [2022-04-06 09:42:43,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:42:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:43,913 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) [2022-04-06 09:42:43,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 09:42:43,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 09:42:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:43,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 09:42:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:44,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:44,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830163972] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:44,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:44,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 09:42:44,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941189463] [2022-04-06 09:42:44,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:44,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 09:42:44,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 09:42:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-04-06 09:42:44,200 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:44,392 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-04-06 09:42:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 09:42:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-04-06 09:42:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:44,393 INFO L225 Difference]: With dead ends: 69 [2022-04-06 09:42:44,394 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 09:42:44,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-04-06 09:42:44,395 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:44,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 54 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 09:42:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-04-06 09:42:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-04-06 09:42:44,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 33 [2022-04-06 09:42:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:44,400 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-04-06 09:42:44,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-04-06 09:42:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 09:42:44,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:44,401 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:44,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:44,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:44,611 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1880410890, now seen corresponding path program 1 times [2022-04-06 09:42:44,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:44,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205555895] [2022-04-06 09:42:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:44,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:44,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:42:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:42:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:44,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205555895] [2022-04-06 09:42:44,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205555895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341770426] [2022-04-06 09:42:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:44,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:44,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:44,725 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) [2022-04-06 09:42:44,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 09:42:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 09:42:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:44,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341770426] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:45,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:45,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2022-04-06 09:42:45,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84956144] [2022-04-06 09:42:45,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:45,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 09:42:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 09:42:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-04-06 09:42:45,012 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:45,278 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-04-06 09:42:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 09:42:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-04-06 09:42:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:45,280 INFO L225 Difference]: With dead ends: 80 [2022-04-06 09:42:45,280 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 09:42:45,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 09:42:45,281 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:45,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 68 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 09:42:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2022-04-06 09:42:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-04-06 09:42:45,286 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 33 [2022-04-06 09:42:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:45,286 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-04-06 09:42:45,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-04-06 09:42:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 09:42:45,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:45,287 INFO L499 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] [2022-04-06 09:42:45,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:45,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:45,500 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1143076746, now seen corresponding path program 2 times [2022-04-06 09:42:45,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:45,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130149007] [2022-04-06 09:42:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:45,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:45,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:45,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:42:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:45,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:42:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:45,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:45,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130149007] [2022-04-06 09:42:45,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130149007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:45,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748438947] [2022-04-06 09:42:45,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:42:45,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:45,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:45,600 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) [2022-04-06 09:42:45,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 09:42:45,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:42:45,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:45,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 09:42:45,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:45,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:45,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748438947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:45,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:45,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-04-06 09:42:45,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598207713] [2022-04-06 09:42:45,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:45,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 09:42:45,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:45,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 09:42:45,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 09:42:45,837 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:46,070 INFO L93 Difference]: Finished difference Result 93 states and 113 transitions. [2022-04-06 09:42:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 09:42:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-04-06 09:42:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:46,071 INFO L225 Difference]: With dead ends: 93 [2022-04-06 09:42:46,071 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 09:42:46,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 09:42:46,072 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:46,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 63 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 09:42:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2022-04-06 09:42:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-04-06 09:42:46,078 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 33 [2022-04-06 09:42:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:46,078 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-04-06 09:42:46,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-04-06 09:42:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 09:42:46,078 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:46,078 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:46,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 09:42:46,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:46,294 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:46,295 INFO L85 PathProgramCache]: Analyzing trace with hash 937116010, now seen corresponding path program 4 times [2022-04-06 09:42:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:46,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050831983] [2022-04-06 09:42:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 09:42:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:42:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:46,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050831983] [2022-04-06 09:42:46,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050831983] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59342981] [2022-04-06 09:42:46,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:42:46,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:46,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:46,364 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) [2022-04-06 09:42:46,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 09:42:46,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:42:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:46,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 09:42:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:46,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:42:46,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59342981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:46,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:46,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-04-06 09:42:46,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465876062] [2022-04-06 09:42:46,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:46,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 09:42:46,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:46,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 09:42:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 09:42:46,505 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:42:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:46,620 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-06 09:42:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 09:42:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-04-06 09:42:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:46,621 INFO L225 Difference]: With dead ends: 56 [2022-04-06 09:42:46,621 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 09:42:46,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-04-06 09:42:46,622 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:46,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 09:42:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-04-06 09:42:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:42:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-04-06 09:42:46,629 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 34 [2022-04-06 09:42:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:46,629 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-04-06 09:42:46,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:42:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-04-06 09:42:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 09:42:46,630 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:46,630 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:46,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:46,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 09:42:46,846 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash 944554286, now seen corresponding path program 5 times [2022-04-06 09:42:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:46,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43777495] [2022-04-06 09:42:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:46,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 09:42:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:42:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:42:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:46,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:46,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43777495] [2022-04-06 09:42:46,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43777495] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:46,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472560056] [2022-04-06 09:42:46,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:42:46,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:46,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:46,939 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) [2022-04-06 09:42:46,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 09:42:46,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-06 09:42:46,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:46,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 09:42:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:47,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:47,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472560056] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:47,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:47,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 09:42:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712253581] [2022-04-06 09:42:47,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:47,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 09:42:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 09:42:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-04-06 09:42:47,310 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:47,588 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2022-04-06 09:42:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 09:42:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-04-06 09:42:47,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:47,593 INFO L225 Difference]: With dead ends: 86 [2022-04-06 09:42:47,593 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 09:42:47,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=1045, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 09:42:47,595 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:47,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 51 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 09:42:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2022-04-06 09:42:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:42:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-04-06 09:42:47,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2022-04-06 09:42:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:47,610 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-04-06 09:42:47,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-04-06 09:42:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 09:42:47,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:47,615 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:47,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 09:42:47,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:47,846 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:47,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1728685230, now seen corresponding path program 2 times [2022-04-06 09:42:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:47,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702276209] [2022-04-06 09:42:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:47,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:47,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 09:42:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:47,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:42:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:47,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:42:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:47,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702276209] [2022-04-06 09:42:47,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702276209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394292944] [2022-04-06 09:42:47,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:42:47,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:47,972 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) [2022-04-06 09:42:48,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 09:42:48,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:42:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:48,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 09:42:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:48,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:48,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394292944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:48,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:48,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-04-06 09:42:48,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588037152] [2022-04-06 09:42:48,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:48,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 09:42:48,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:48,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 09:42:48,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-04-06 09:42:48,257 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:48,541 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2022-04-06 09:42:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 09:42:48,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-04-06 09:42:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:48,542 INFO L225 Difference]: With dead ends: 101 [2022-04-06 09:42:48,542 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 09:42:48,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 09:42:48,543 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:48,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 84 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 09:42:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2022-04-06 09:42:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:42:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-04-06 09:42:48,548 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2022-04-06 09:42:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:48,549 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-04-06 09:42:48,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-04-06 09:42:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 09:42:48,549 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:48,549 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:48,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:48,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 09:42:48,765 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1016966866, now seen corresponding path program 3 times [2022-04-06 09:42:48,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:48,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340142863] [2022-04-06 09:42:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:48,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:48,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:48,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 09:42:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:48,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:42:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:42:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340142863] [2022-04-06 09:42:48,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340142863] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383975670] [2022-04-06 09:42:48,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:42:48,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:48,859 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) [2022-04-06 09:42:48,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 09:42:48,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 09:42:48,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 09:42:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:49,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:49,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383975670] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:49,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:49,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 24 [2022-04-06 09:42:49,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433231613] [2022-04-06 09:42:49,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:49,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 09:42:49,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:49,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 09:42:49,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-04-06 09:42:49,158 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:49,457 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2022-04-06 09:42:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 09:42:49,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-04-06 09:42:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:49,458 INFO L225 Difference]: With dead ends: 115 [2022-04-06 09:42:49,458 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 09:42:49,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=1309, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 09:42:49,460 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:49,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 70 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 09:42:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 51. [2022-04-06 09:42:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:42:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-04-06 09:42:49,466 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2022-04-06 09:42:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:49,466 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-04-06 09:42:49,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-04-06 09:42:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 09:42:49,466 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:49,466 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:49,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:49,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 09:42:49,679 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1526863022, now seen corresponding path program 3 times [2022-04-06 09:42:49,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:49,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070727571] [2022-04-06 09:42:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 09:42:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:42:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:42:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070727571] [2022-04-06 09:42:49,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070727571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436093339] [2022-04-06 09:42:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:42:49,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:49,777 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) [2022-04-06 09:42:49,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 09:42:49,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 09:42:49,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 09:42:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:49,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:50,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436093339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:50,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:50,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2022-04-06 09:42:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007119946] [2022-04-06 09:42:50,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:50,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 09:42:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:50,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 09:42:50,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-04-06 09:42:50,061 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:50,352 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2022-04-06 09:42:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 09:42:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 41 [2022-04-06 09:42:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:50,355 INFO L225 Difference]: With dead ends: 131 [2022-04-06 09:42:50,355 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 09:42:50,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 09:42:50,358 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:50,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 64 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 09:42:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 53. [2022-04-06 09:42:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.170731707317073) internal successors, (48), 42 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:42:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-04-06 09:42:50,375 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2022-04-06 09:42:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:50,375 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-04-06 09:42:50,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:42:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-04-06 09:42:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 09:42:50,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:50,376 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:50,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:50,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 09:42:50,592 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash 765704974, now seen corresponding path program 6 times [2022-04-06 09:42:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:50,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226617875] [2022-04-06 09:42:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:50,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 09:42:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:50,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:42:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:50,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:42:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:50,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226617875] [2022-04-06 09:42:50,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226617875] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765050109] [2022-04-06 09:42:50,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:42:50,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:50,655 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) [2022-04-06 09:42:50,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 09:42:50,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 09:42:50,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:50,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 09:42:50,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:50,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:42:50,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765050109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:50,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:50,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-04-06 09:42:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744566579] [2022-04-06 09:42:50,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:50,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 09:42:50,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 09:42:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 09:42:50,809 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:50,949 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-04-06 09:42:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 09:42:50,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-04-06 09:42:50,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:50,951 INFO L225 Difference]: With dead ends: 66 [2022-04-06 09:42:50,951 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 09:42:50,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-04-06 09:42:50,953 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:50,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 52 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 09:42:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-04-06 09:42:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-04-06 09:42:50,960 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 42 [2022-04-06 09:42:50,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:50,960 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-04-06 09:42:50,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:42:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-04-06 09:42:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 09:42:50,960 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:50,961 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:50,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:51,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 09:42:51,177 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1409620214, now seen corresponding path program 7 times [2022-04-06 09:42:51,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:51,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055280917] [2022-04-06 09:42:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:51,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:51,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:51,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 09:42:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:51,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:42:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:51,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:42:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:51,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:42:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:51,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055280917] [2022-04-06 09:42:51,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055280917] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650818243] [2022-04-06 09:42:51,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:42:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:51,292 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) [2022-04-06 09:42:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 09:42:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 09:42:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:51,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:51,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650818243] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:51,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:51,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 09:42:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195787755] [2022-04-06 09:42:51,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:51,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 09:42:51,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 09:42:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-04-06 09:42:51,645 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:51,937 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2022-04-06 09:42:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 09:42:51,937 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-04-06 09:42:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:51,938 INFO L225 Difference]: With dead ends: 103 [2022-04-06 09:42:51,938 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 09:42:51,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=1430, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 09:42:51,939 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:51,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 76 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 09:42:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2022-04-06 09:42:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-04-06 09:42:51,945 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 49 [2022-04-06 09:42:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:51,945 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-04-06 09:42:51,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-04-06 09:42:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 09:42:51,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:51,946 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:51,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:52,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:52,150 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:52,150 INFO L85 PathProgramCache]: Analyzing trace with hash 794577546, now seen corresponding path program 4 times [2022-04-06 09:42:52,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:52,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918968672] [2022-04-06 09:42:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:52,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:52,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:52,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 09:42:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:52,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:42:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:52,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:42:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:42:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918968672] [2022-04-06 09:42:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918968672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918437137] [2022-04-06 09:42:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:42:52,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:52,306 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) [2022-04-06 09:42:52,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 09:42:52,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:42:52,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 09:42:52,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:52,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:52,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918437137] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:52,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:52,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 29 [2022-04-06 09:42:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027186444] [2022-04-06 09:42:52,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:52,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 09:42:52,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 09:42:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-04-06 09:42:52,695 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:53,052 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2022-04-06 09:42:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 09:42:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-04-06 09:42:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:53,053 INFO L225 Difference]: With dead ends: 122 [2022-04-06 09:42:53,053 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 09:42:53,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 09:42:53,054 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:53,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 90 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:42:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 09:42:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2022-04-06 09:42:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-04-06 09:42:53,075 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 49 [2022-04-06 09:42:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:53,075 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-04-06 09:42:53,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-04-06 09:42:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 09:42:53,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:53,075 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:53,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 09:42:53,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 09:42:53,288 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -796887286, now seen corresponding path program 5 times [2022-04-06 09:42:53,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:53,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144853087] [2022-04-06 09:42:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:53,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:53,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 09:42:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:42:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:42:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:53,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:42:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:53,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:53,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144853087] [2022-04-06 09:42:53,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144853087] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:53,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553217848] [2022-04-06 09:42:53,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:42:53,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:53,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:53,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 09:42:53,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-06 09:42:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 09:42:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:53,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553217848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:53,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:53,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 28 [2022-04-06 09:42:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918273893] [2022-04-06 09:42:53,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:53,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 09:42:53,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 09:42:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-04-06 09:42:53,737 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:54,104 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2022-04-06 09:42:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 09:42:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-04-06 09:42:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:54,105 INFO L225 Difference]: With dead ends: 140 [2022-04-06 09:42:54,105 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 09:42:54,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=455, Invalid=1897, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 09:42:54,106 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:54,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 70 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:42:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 09:42:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 61. [2022-04-06 09:42:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-04-06 09:42:54,114 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 49 [2022-04-06 09:42:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:54,114 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-04-06 09:42:54,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-04-06 09:42:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 09:42:54,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:54,115 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:54,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:54,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 09:42:54,315 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1679508854, now seen corresponding path program 6 times [2022-04-06 09:42:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218045051] [2022-04-06 09:42:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:54,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 09:42:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:54,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:42:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:54,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:42:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:42:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:54,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218045051] [2022-04-06 09:42:54,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218045051] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743660094] [2022-04-06 09:42:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:42:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:54,474 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:54,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 09:42:54,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 09:42:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:54,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 09:42:54,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:54,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:54,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743660094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:54,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:54,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2022-04-06 09:42:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403513336] [2022-04-06 09:42:54,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:54,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 09:42:54,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 09:42:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-04-06 09:42:54,856 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:55,271 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2022-04-06 09:42:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 09:42:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-04-06 09:42:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:55,272 INFO L225 Difference]: With dead ends: 157 [2022-04-06 09:42:55,272 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 09:42:55,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=457, Invalid=1895, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 09:42:55,273 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 125 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:55,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 81 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:42:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 09:42:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 61. [2022-04-06 09:42:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-04-06 09:42:55,282 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 49 [2022-04-06 09:42:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:55,282 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-04-06 09:42:55,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-04-06 09:42:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 09:42:55,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:55,282 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:55,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:55,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:55,498 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2032797450, now seen corresponding path program 4 times [2022-04-06 09:42:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:55,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20299195] [2022-04-06 09:42:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:55,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 09:42:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:42:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:55,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:42:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:55,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:42:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:55,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:55,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20299195] [2022-04-06 09:42:55,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20299195] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:55,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868250993] [2022-04-06 09:42:55,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:42:55,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:55,605 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:55,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 09:42:55,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:42:55,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:55,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 09:42:55,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:55,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:55,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868250993] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:55,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:55,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 26 [2022-04-06 09:42:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771114010] [2022-04-06 09:42:55,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:55,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 09:42:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 09:42:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-04-06 09:42:55,813 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:56,096 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2022-04-06 09:42:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 09:42:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 49 [2022-04-06 09:42:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:56,097 INFO L225 Difference]: With dead ends: 176 [2022-04-06 09:42:56,097 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 09:42:56,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=436, Invalid=1726, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 09:42:56,098 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 166 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:56,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 61 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 09:42:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 63. [2022-04-06 09:42:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.163265306122449) internal successors, (57), 50 states have internal predecessors, (57), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:42:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-04-06 09:42:56,107 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 49 [2022-04-06 09:42:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:56,107 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-04-06 09:42:56,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:42:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-04-06 09:42:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 09:42:56,108 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:56,108 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:56,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:56,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:56,315 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 925499626, now seen corresponding path program 8 times [2022-04-06 09:42:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:56,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835864151] [2022-04-06 09:42:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:56,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 09:42:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:42:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:56,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:42:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:42:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835864151] [2022-04-06 09:42:56,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835864151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:56,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057431773] [2022-04-06 09:42:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:42:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:56,396 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:56,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 09:42:56,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:42:56,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 09:42:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:56,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 09:42:56,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057431773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:56,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:56,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2022-04-06 09:42:56,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544198304] [2022-04-06 09:42:56,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:56,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 09:42:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 09:42:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 09:42:56,600 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 11 states have internal predecessors, (38), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:42:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:56,761 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-04-06 09:42:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 09:42:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 11 states have internal predecessors, (38), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2022-04-06 09:42:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:56,762 INFO L225 Difference]: With dead ends: 76 [2022-04-06 09:42:56,762 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 09:42:56,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-04-06 09:42:56,763 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:56,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 54 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 09:42:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-04-06 09:42:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:42:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-04-06 09:42:56,772 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 50 [2022-04-06 09:42:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:56,772 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-04-06 09:42:56,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 11 states have internal predecessors, (38), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:42:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-04-06 09:42:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 09:42:56,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:56,773 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:56,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:56,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:56,989 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash -162557522, now seen corresponding path program 9 times [2022-04-06 09:42:56,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:56,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466919201] [2022-04-06 09:42:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:57,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:57,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 09:42:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:57,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:42:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:57,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:42:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:57,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:42:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:57,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:42:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:57,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:57,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466919201] [2022-04-06 09:42:57,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466919201] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:57,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845230768] [2022-04-06 09:42:57,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:42:57,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:57,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:57,114 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:57,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 09:42:57,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 09:42:57,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:57,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 09:42:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:57,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845230768] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:57,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:57,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 09:42:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291922832] [2022-04-06 09:42:57,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:57,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 09:42:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 09:42:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 09:42:57,571 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:42:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:57,919 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2022-04-06 09:42:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 09:42:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-04-06 09:42:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:57,920 INFO L225 Difference]: With dead ends: 120 [2022-04-06 09:42:57,920 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 09:42:57,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=1875, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 09:42:57,921 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:57,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 92 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:42:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 09:42:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2022-04-06 09:42:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:42:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-04-06 09:42:57,950 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 57 [2022-04-06 09:42:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:57,950 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-04-06 09:42:57,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:42:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-04-06 09:42:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 09:42:57,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:57,951 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:57,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:58,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 09:42:58,167 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash 567637294, now seen corresponding path program 7 times [2022-04-06 09:42:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:58,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061445249] [2022-04-06 09:42:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:58,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 09:42:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:42:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:42:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:42:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:42:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:58,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:58,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061445249] [2022-04-06 09:42:58,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061445249] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:58,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109742085] [2022-04-06 09:42:58,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:42:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:58,298 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:58,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 09:42:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:58,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 09:42:58,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:58,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:58,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109742085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:58,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:58,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2022-04-06 09:42:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894952447] [2022-04-06 09:42:58,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:58,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 09:42:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:58,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 09:42:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 09:42:58,666 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:42:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:42:59,015 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2022-04-06 09:42:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 09:42:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-04-06 09:42:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:42:59,016 INFO L225 Difference]: With dead ends: 143 [2022-04-06 09:42:59,016 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 09:42:59,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=547, Invalid=2315, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:42:59,018 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:42:59,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 71 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:42:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 09:42:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2022-04-06 09:42:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:42:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-04-06 09:42:59,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 57 [2022-04-06 09:42:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:42:59,030 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-04-06 09:42:59,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:42:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-04-06 09:42:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 09:42:59,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:42:59,030 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:42:59,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 09:42:59,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 09:42:59,246 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:42:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:42:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1145381294, now seen corresponding path program 8 times [2022-04-06 09:42:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:42:59,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857597481] [2022-04-06 09:42:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:42:59,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:42:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:59,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:42:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:59,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 09:42:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:59,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:42:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:42:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:59,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:42:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:42:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:42:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:42:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857597481] [2022-04-06 09:42:59,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857597481] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:42:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419946085] [2022-04-06 09:42:59,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:42:59,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:42:59,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:42:59,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:42:59,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 09:42:59,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:42:59,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:42:59,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 09:42:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:42:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:59,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:42:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:42:59,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419946085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:42:59,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:42:59,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 32 [2022-04-06 09:42:59,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264307119] [2022-04-06 09:42:59,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:42:59,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 09:42:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:42:59,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 09:42:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-04-06 09:42:59,858 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:00,315 INFO L93 Difference]: Finished difference Result 165 states and 199 transitions. [2022-04-06 09:43:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 09:43:00,316 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-04-06 09:43:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:00,317 INFO L225 Difference]: With dead ends: 165 [2022-04-06 09:43:00,317 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 09:43:00,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=600, Invalid=2592, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 09:43:00,318 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:00,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 98 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 09:43:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 71. [2022-04-06 09:43:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:43:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-04-06 09:43:00,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 57 [2022-04-06 09:43:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:00,331 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-04-06 09:43:00,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-04-06 09:43:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 09:43:00,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:00,332 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:00,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:00,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:00,540 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1995302190, now seen corresponding path program 9 times [2022-04-06 09:43:00,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132385954] [2022-04-06 09:43:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:00,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:00,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:00,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 09:43:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:00,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:43:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:00,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:43:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:00,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:43:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:00,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:43:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:00,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:00,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132385954] [2022-04-06 09:43:00,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132385954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364576029] [2022-04-06 09:43:00,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:43:00,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:00,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:00,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:00,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 09:43:00,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 09:43:00,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 09:43:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:00,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:01,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364576029] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:01,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:01,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 31 [2022-04-06 09:43:01,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649364130] [2022-04-06 09:43:01,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:01,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 09:43:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:01,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 09:43:01,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-04-06 09:43:01,036 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:01,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:01,434 INFO L93 Difference]: Finished difference Result 186 states and 227 transitions. [2022-04-06 09:43:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 09:43:01,434 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-04-06 09:43:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:01,435 INFO L225 Difference]: With dead ends: 186 [2022-04-06 09:43:01,435 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 09:43:01,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=620, Invalid=2686, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 09:43:01,436 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:01,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 102 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 09:43:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 71. [2022-04-06 09:43:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:43:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-04-06 09:43:01,450 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 57 [2022-04-06 09:43:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:01,450 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-04-06 09:43:01,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-04-06 09:43:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 09:43:01,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:01,455 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:01,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:01,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:01,671 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1302416978, now seen corresponding path program 10 times [2022-04-06 09:43:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:01,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639446983] [2022-04-06 09:43:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:01,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:01,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 09:43:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:43:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:01,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:43:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:01,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:43:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:01,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:43:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:01,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639446983] [2022-04-06 09:43:01,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639446983] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363348285] [2022-04-06 09:43:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:01,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:01,757 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:01,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 09:43:01,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 09:43:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:02,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:02,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363348285] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:02,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:02,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 30 [2022-04-06 09:43:02,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223087532] [2022-04-06 09:43:02,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:02,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 09:43:02,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 09:43:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-04-06 09:43:02,171 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:02,646 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2022-04-06 09:43:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 09:43:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-04-06 09:43:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:02,647 INFO L225 Difference]: With dead ends: 206 [2022-04-06 09:43:02,647 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 09:43:02,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=2588, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 09:43:02,649 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:02,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 62 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 09:43:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 71. [2022-04-06 09:43:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:43:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-04-06 09:43:02,697 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 57 [2022-04-06 09:43:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:02,697 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-04-06 09:43:02,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-04-06 09:43:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 09:43:02,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:02,698 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:02,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 09:43:02,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 09:43:02,914 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash 392320302, now seen corresponding path program 5 times [2022-04-06 09:43:02,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:02,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719437272] [2022-04-06 09:43:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:02,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:03,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 09:43:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:03,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:43:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:03,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:43:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:03,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:43:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:03,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:43:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:03,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719437272] [2022-04-06 09:43:03,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719437272] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785639346] [2022-04-06 09:43:03,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:03,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:03,084 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:03,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 09:43:03,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-06 09:43:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 09:43:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:03,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:03,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785639346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:03,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:03,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 29 [2022-04-06 09:43:03,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069260422] [2022-04-06 09:43:03,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:03,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 09:43:03,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:03,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 09:43:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-04-06 09:43:03,444 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:03,938 INFO L93 Difference]: Finished difference Result 228 states and 284 transitions. [2022-04-06 09:43:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 09:43:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 57 [2022-04-06 09:43:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:03,939 INFO L225 Difference]: With dead ends: 228 [2022-04-06 09:43:03,939 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 09:43:03,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=562, Invalid=2300, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:43:03,941 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:03,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 71 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 09:43:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 73. [2022-04-06 09:43:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:43:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-04-06 09:43:03,955 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 57 [2022-04-06 09:43:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:03,955 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-04-06 09:43:03,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:43:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-04-06 09:43:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 09:43:03,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:03,956 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:03,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:04,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 09:43:04,173 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1295436686, now seen corresponding path program 10 times [2022-04-06 09:43:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:04,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382518677] [2022-04-06 09:43:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:04,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:04,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:04,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:04,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:04,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:04,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382518677] [2022-04-06 09:43:04,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382518677] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:04,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311783006] [2022-04-06 09:43:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:04,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:04,268 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:04,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 09:43:04,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:04,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 09:43:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:04,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:43:04,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311783006] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:04,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:04,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-04-06 09:43:04,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625551233] [2022-04-06 09:43:04,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:04,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 09:43:04,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 09:43:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 09:43:04,503 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:43:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:04,725 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-04-06 09:43:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 09:43:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2022-04-06 09:43:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:04,726 INFO L225 Difference]: With dead ends: 86 [2022-04-06 09:43:04,726 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 09:43:04,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-04-06 09:43:04,726 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:04,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 56 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 09:43:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-04-06 09:43:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-04-06 09:43:04,740 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 58 [2022-04-06 09:43:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:04,740 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-04-06 09:43:04,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 12 states have internal predecessors, (41), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:43:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-04-06 09:43:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 09:43:04,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:04,741 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:04,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:04,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 09:43:04,955 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1953253002, now seen corresponding path program 11 times [2022-04-06 09:43:04,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751253989] [2022-04-06 09:43:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:43:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:05,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751253989] [2022-04-06 09:43:05,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751253989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570551085] [2022-04-06 09:43:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:05,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:05,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:05,124 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:05,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 09:43:05,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-04-06 09:43:05,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 09:43:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:05,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:05,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570551085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:05,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:05,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 09:43:05,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491625079] [2022-04-06 09:43:05,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:05,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 09:43:05,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:05,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 09:43:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 09:43:05,670 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:06,039 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2022-04-06 09:43:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 09:43:06,040 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-04-06 09:43:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:06,041 INFO L225 Difference]: With dead ends: 137 [2022-04-06 09:43:06,041 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 09:43:06,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=2380, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 09:43:06,042 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:06,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 68 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 09:43:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2022-04-06 09:43:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-04-06 09:43:06,058 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 65 [2022-04-06 09:43:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:06,059 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-04-06 09:43:06,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-04-06 09:43:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 09:43:06,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:06,059 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:06,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:06,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 09:43:06,275 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 462858762, now seen corresponding path program 11 times [2022-04-06 09:43:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989675915] [2022-04-06 09:43:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:06,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:43:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:06,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:06,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989675915] [2022-04-06 09:43:06,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989675915] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:06,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235434436] [2022-04-06 09:43:06,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:06,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:06,436 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:06,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 09:43:06,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-04-06 09:43:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:06,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 09:43:06,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:06,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:06,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235434436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:06,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:06,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 37 [2022-04-06 09:43:06,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703715014] [2022-04-06 09:43:06,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:06,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 09:43:06,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:06,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 09:43:06,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 09:43:06,931 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:07,487 INFO L93 Difference]: Finished difference Result 164 states and 195 transitions. [2022-04-06 09:43:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 09:43:07,488 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-04-06 09:43:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:07,488 INFO L225 Difference]: With dead ends: 164 [2022-04-06 09:43:07,488 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 09:43:07,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 09:43:07,492 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:07,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 123 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 09:43:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 81. [2022-04-06 09:43:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-04-06 09:43:07,511 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 65 [2022-04-06 09:43:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:07,511 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-04-06 09:43:07,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-04-06 09:43:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 09:43:07,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:07,511 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:07,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:07,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:07,727 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2077349514, now seen corresponding path program 12 times [2022-04-06 09:43:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:07,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906175446] [2022-04-06 09:43:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:43:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:07,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:07,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906175446] [2022-04-06 09:43:07,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906175446] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:07,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736357315] [2022-04-06 09:43:07,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:43:07,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:07,890 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:07,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 09:43:07,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 09:43:07,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 09:43:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:08,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:08,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736357315] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:08,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:08,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 36 [2022-04-06 09:43:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502342274] [2022-04-06 09:43:08,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:08,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 09:43:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 09:43:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 09:43:08,347 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:08,866 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2022-04-06 09:43:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 09:43:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-04-06 09:43:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:08,867 INFO L225 Difference]: With dead ends: 190 [2022-04-06 09:43:08,867 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 09:43:08,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=766, Invalid=3394, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 09:43:08,869 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:08,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 87 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 09:43:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 81. [2022-04-06 09:43:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-04-06 09:43:08,890 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 65 [2022-04-06 09:43:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:08,890 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-04-06 09:43:08,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-04-06 09:43:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 09:43:08,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:08,890 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:08,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 09:43:09,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:09,107 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash -918611446, now seen corresponding path program 13 times [2022-04-06 09:43:09,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:09,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102272528] [2022-04-06 09:43:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:09,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:43:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 53 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:09,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102272528] [2022-04-06 09:43:09,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102272528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91655314] [2022-04-06 09:43:09,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:43:09,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:09,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:09,248 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:09,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 09:43:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 09:43:09,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:09,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:09,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91655314] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:09,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:09,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 35 [2022-04-06 09:43:09,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113950523] [2022-04-06 09:43:09,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:09,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 09:43:09,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:09,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 09:43:09,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 09:43:09,708 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:10,353 INFO L93 Difference]: Finished difference Result 215 states and 262 transitions. [2022-04-06 09:43:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 09:43:10,353 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-04-06 09:43:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:10,354 INFO L225 Difference]: With dead ends: 215 [2022-04-06 09:43:10,354 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 09:43:10,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=810, Invalid=3612, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 09:43:10,356 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:10,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 109 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:43:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 09:43:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 81. [2022-04-06 09:43:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-04-06 09:43:10,379 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 65 [2022-04-06 09:43:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:10,379 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-04-06 09:43:10,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-04-06 09:43:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 09:43:10,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:10,380 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:10,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:10,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 09:43:10,596 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1062954634, now seen corresponding path program 14 times [2022-04-06 09:43:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504480603] [2022-04-06 09:43:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:43:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:10,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:10,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504480603] [2022-04-06 09:43:10,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504480603] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:10,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388305052] [2022-04-06 09:43:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:43:10,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:10,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:10,743 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:10,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 09:43:10,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:43:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 09:43:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:10,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:11,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388305052] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:11,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:11,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 34 [2022-04-06 09:43:11,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819729074] [2022-04-06 09:43:11,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:11,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 09:43:11,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:11,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 09:43:11,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 09:43:11,065 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:11,667 INFO L93 Difference]: Finished difference Result 239 states and 294 transitions. [2022-04-06 09:43:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 09:43:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-04-06 09:43:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:11,668 INFO L225 Difference]: With dead ends: 239 [2022-04-06 09:43:11,668 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 09:43:11,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 09:43:11,669 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:11,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 68 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 09:43:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 81. [2022-04-06 09:43:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-04-06 09:43:11,690 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 65 [2022-04-06 09:43:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:11,690 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-04-06 09:43:11,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-04-06 09:43:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 09:43:11,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:11,691 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:11,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:11,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:11,907 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1505523190, now seen corresponding path program 15 times [2022-04-06 09:43:11,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:11,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918553568] [2022-04-06 09:43:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:11,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:43:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:12,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:12,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918553568] [2022-04-06 09:43:12,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918553568] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:12,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969122552] [2022-04-06 09:43:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:43:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:12,055 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:12,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 09:43:12,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-04-06 09:43:12,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 09:43:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:12,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:12,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969122552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:12,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:12,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 33 [2022-04-06 09:43:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519031877] [2022-04-06 09:43:12,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:12,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 09:43:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 09:43:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 09:43:12,505 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:12,940 INFO L93 Difference]: Finished difference Result 262 states and 325 transitions. [2022-04-06 09:43:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 09:43:12,941 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-04-06 09:43:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:12,942 INFO L225 Difference]: With dead ends: 262 [2022-04-06 09:43:12,942 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 09:43:12,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=772, Invalid=3388, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 09:43:12,943 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:12,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 73 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 09:43:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 81. [2022-04-06 09:43:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-04-06 09:43:12,965 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 65 [2022-04-06 09:43:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:12,965 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-04-06 09:43:12,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-04-06 09:43:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 09:43:12,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:12,966 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:12,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:13,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:13,182 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2013853322, now seen corresponding path program 6 times [2022-04-06 09:43:13,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:13,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571929900] [2022-04-06 09:43:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 09:43:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:43:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:43:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:43:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:43:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:43:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:13,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571929900] [2022-04-06 09:43:13,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571929900] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:13,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607349801] [2022-04-06 09:43:13,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:43:13,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:13,339 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:13,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 09:43:13,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 09:43:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 09:43:13,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:13,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:13,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607349801] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:13,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:13,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 32 [2022-04-06 09:43:13,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083187184] [2022-04-06 09:43:13,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:13,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 09:43:13,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 09:43:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-04-06 09:43:13,637 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:14,076 INFO L93 Difference]: Finished difference Result 287 states and 359 transitions. [2022-04-06 09:43:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 09:43:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 65 [2022-04-06 09:43:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:14,078 INFO L225 Difference]: With dead ends: 287 [2022-04-06 09:43:14,078 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 09:43:14,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=704, Invalid=2956, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 09:43:14,078 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 298 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:14,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 69 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 09:43:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 83. [2022-04-06 09:43:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 66 states have internal predecessors, (75), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2022-04-06 09:43:14,101 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 65 [2022-04-06 09:43:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:14,102 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2022-04-06 09:43:14,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:43:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2022-04-06 09:43:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 09:43:14,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:14,102 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:14,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:14,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 09:43:14,319 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash -320102294, now seen corresponding path program 12 times [2022-04-06 09:43:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:14,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501415010] [2022-04-06 09:43:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:14,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:14,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:14,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501415010] [2022-04-06 09:43:14,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501415010] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003260822] [2022-04-06 09:43:14,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:43:14,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:14,416 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:14,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 09:43:14,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 09:43:14,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 09:43:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:43:14,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003260822] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:14,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:14,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 16 [2022-04-06 09:43:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177189506] [2022-04-06 09:43:14,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:14,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 09:43:14,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 09:43:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 09:43:14,696 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:43:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:14,950 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2022-04-06 09:43:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 09:43:14,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 66 [2022-04-06 09:43:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:14,951 INFO L225 Difference]: With dead ends: 96 [2022-04-06 09:43:14,951 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 09:43:14,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-04-06 09:43:14,951 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:14,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 78 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 09:43:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-04-06 09:43:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-04-06 09:43:14,973 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 66 [2022-04-06 09:43:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:14,973 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-04-06 09:43:14,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 09:43:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-04-06 09:43:14,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:14,974 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:14,974 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:14,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:15,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 09:43:15,190 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:15,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1088651822, now seen corresponding path program 13 times [2022-04-06 09:43:15,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:15,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20761305] [2022-04-06 09:43:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:15,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:15,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20761305] [2022-04-06 09:43:15,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20761305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953467971] [2022-04-06 09:43:15,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:43:15,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:15,383 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:15,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 09:43:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:15,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:16,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953467971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:16,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:16,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 09:43:16,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460998176] [2022-04-06 09:43:16,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:16,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 09:43:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 09:43:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1403, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 09:43:16,018 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:16,454 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2022-04-06 09:43:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 09:43:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:16,455 INFO L225 Difference]: With dead ends: 154 [2022-04-06 09:43:16,455 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 09:43:16,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=715, Invalid=2945, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 09:43:16,456 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:16,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 80 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 09:43:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2022-04-06 09:43:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-04-06 09:43:16,493 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 73 [2022-04-06 09:43:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:16,493 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-04-06 09:43:16,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-04-06 09:43:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:16,494 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:16,494 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:16,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:16,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 09:43:16,707 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1221433938, now seen corresponding path program 16 times [2022-04-06 09:43:16,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:16,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837196494] [2022-04-06 09:43:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:16,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837196494] [2022-04-06 09:43:16,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837196494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729565177] [2022-04-06 09:43:16,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:16,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:16,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:16,913 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:16,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 09:43:16,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:16,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:17,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:17,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729565177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:17,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:17,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 41 [2022-04-06 09:43:17,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295364669] [2022-04-06 09:43:17,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:17,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 09:43:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:17,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 09:43:17,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 09:43:17,486 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:18,054 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2022-04-06 09:43:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 09:43:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:18,055 INFO L225 Difference]: With dead ends: 185 [2022-04-06 09:43:18,055 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 09:43:18,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=841, Invalid=3715, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 09:43:18,056 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 75 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:18,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 84 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 09:43:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 91. [2022-04-06 09:43:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-04-06 09:43:18,083 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 73 [2022-04-06 09:43:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:18,083 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-04-06 09:43:18,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-04-06 09:43:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:18,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:18,083 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:18,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:18,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:18,299 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1850142162, now seen corresponding path program 17 times [2022-04-06 09:43:18,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:18,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726597438] [2022-04-06 09:43:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:18,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:18,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726597438] [2022-04-06 09:43:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726597438] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705957959] [2022-04-06 09:43:18,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:18,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:18,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:18,476 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:18,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 09:43:18,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-04-06 09:43:18,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:18,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:18,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:19,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705957959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:19,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:19,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 40 [2022-04-06 09:43:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842840748] [2022-04-06 09:43:19,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:19,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 09:43:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 09:43:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 09:43:19,064 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:19,791 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2022-04-06 09:43:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 09:43:19,791 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:19,792 INFO L225 Difference]: With dead ends: 215 [2022-04-06 09:43:19,792 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 09:43:19,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=953, Invalid=4303, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 09:43:19,793 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:19,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 109 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 09:43:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 91. [2022-04-06 09:43:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-04-06 09:43:19,824 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 73 [2022-04-06 09:43:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:19,825 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-04-06 09:43:19,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-04-06 09:43:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:19,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:19,825 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:19,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:20,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 09:43:20,042 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:20,042 INFO L85 PathProgramCache]: Analyzing trace with hash 761976238, now seen corresponding path program 18 times [2022-04-06 09:43:20,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:20,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652842742] [2022-04-06 09:43:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:20,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:20,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:20,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652842742] [2022-04-06 09:43:20,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652842742] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:20,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926697649] [2022-04-06 09:43:20,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:43:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:20,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:20,217 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:20,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 09:43:20,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 09:43:20,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:20,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:20,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926697649] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:20,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:20,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 39 [2022-04-06 09:43:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129059048] [2022-04-06 09:43:20,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:20,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 09:43:20,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 09:43:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 09:43:20,720 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:21,427 INFO L93 Difference]: Finished difference Result 244 states and 297 transitions. [2022-04-06 09:43:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 09:43:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:21,429 INFO L225 Difference]: With dead ends: 244 [2022-04-06 09:43:21,429 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 09:43:21,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1027, Invalid=4673, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 09:43:21,429 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 112 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:21,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 94 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:43:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 09:43:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 91. [2022-04-06 09:43:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-04-06 09:43:21,460 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 73 [2022-04-06 09:43:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:21,460 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-04-06 09:43:21,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-04-06 09:43:21,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:21,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:21,461 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:21,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:21,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 09:43:21,669 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:21,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash 984785454, now seen corresponding path program 19 times [2022-04-06 09:43:21,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:21,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133128172] [2022-04-06 09:43:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:21,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:21,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133128172] [2022-04-06 09:43:21,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133128172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:21,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147057764] [2022-04-06 09:43:21,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:43:21,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:21,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:21,827 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:21,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 09:43:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:22,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:22,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147057764] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:22,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:22,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 38 [2022-04-06 09:43:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310276840] [2022-04-06 09:43:22,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:22,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 09:43:22,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 09:43:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 09:43:22,282 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:22,829 INFO L93 Difference]: Finished difference Result 272 states and 334 transitions. [2022-04-06 09:43:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 09:43:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:22,836 INFO L225 Difference]: With dead ends: 272 [2022-04-06 09:43:22,836 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 09:43:22,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1054, Invalid=4798, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 09:43:22,839 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:22,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 84 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 09:43:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 91. [2022-04-06 09:43:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-04-06 09:43:22,870 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 73 [2022-04-06 09:43:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:22,870 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-04-06 09:43:22,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-04-06 09:43:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:22,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:22,871 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:22,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:23,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:23,087 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1224784466, now seen corresponding path program 20 times [2022-04-06 09:43:23,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:23,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603795369] [2022-04-06 09:43:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:23,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:23,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603795369] [2022-04-06 09:43:23,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603795369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:23,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397339798] [2022-04-06 09:43:23,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:43:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:23,218 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:23,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 09:43:23,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:43:23,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:23,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:23,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:23,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397339798] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:23,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:23,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 37 [2022-04-06 09:43:23,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046805882] [2022-04-06 09:43:23,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:23,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 09:43:23,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 09:43:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 09:43:23,770 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:24,413 INFO L93 Difference]: Finished difference Result 299 states and 370 transitions. [2022-04-06 09:43:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 09:43:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:24,415 INFO L225 Difference]: With dead ends: 299 [2022-04-06 09:43:24,416 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 09:43:24,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1031, Invalid=4669, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 09:43:24,416 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:24,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 73 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 09:43:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 91. [2022-04-06 09:43:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-04-06 09:43:24,448 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 73 [2022-04-06 09:43:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:24,448 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-04-06 09:43:24,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-04-06 09:43:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:24,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:24,450 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:24,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 09:43:24,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 09:43:24,666 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -187682258, now seen corresponding path program 21 times [2022-04-06 09:43:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:24,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771300133] [2022-04-06 09:43:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:24,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:24,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:24,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771300133] [2022-04-06 09:43:24,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771300133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:24,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995604135] [2022-04-06 09:43:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:43:24,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:24,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:24,856 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:24,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 09:43:24,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-04-06 09:43:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:24,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:25,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995604135] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:25,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:25,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 36 [2022-04-06 09:43:25,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083418478] [2022-04-06 09:43:25,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:25,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 09:43:25,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 09:43:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 09:43:25,385 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:26,119 INFO L93 Difference]: Finished difference Result 325 states and 405 transitions. [2022-04-06 09:43:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 09:43:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:26,120 INFO L225 Difference]: With dead ends: 325 [2022-04-06 09:43:26,120 INFO L226 Difference]: Without dead ends: 293 [2022-04-06 09:43:26,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=961, Invalid=4295, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 09:43:26,122 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:26,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 90 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-06 09:43:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 91. [2022-04-06 09:43:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-04-06 09:43:26,166 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 73 [2022-04-06 09:43:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:26,166 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-04-06 09:43:26,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-04-06 09:43:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 09:43:26,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:26,167 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:26,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:26,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:26,380 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2062529966, now seen corresponding path program 7 times [2022-04-06 09:43:26,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:26,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324362176] [2022-04-06 09:43:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:26,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:43:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:43:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:43:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:43:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:43:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:43:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:43:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:26,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324362176] [2022-04-06 09:43:26,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324362176] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290276149] [2022-04-06 09:43:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:43:26,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:26,485 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:26,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 09:43:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 09:43:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:26,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:26,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290276149] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:26,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:26,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 35 [2022-04-06 09:43:26,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887068533] [2022-04-06 09:43:26,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:26,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 09:43:26,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:26,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 09:43:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 09:43:26,790 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:27,446 INFO L93 Difference]: Finished difference Result 353 states and 443 transitions. [2022-04-06 09:43:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 09:43:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 73 [2022-04-06 09:43:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:27,447 INFO L225 Difference]: With dead ends: 353 [2022-04-06 09:43:27,447 INFO L226 Difference]: Without dead ends: 321 [2022-04-06 09:43:27,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=862, Invalid=3694, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 09:43:27,448 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 252 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:27,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 70 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-04-06 09:43:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 93. [2022-04-06 09:43:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 74 states have internal predecessors, (84), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-04-06 09:43:27,484 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 73 [2022-04-06 09:43:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:27,484 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-04-06 09:43:27,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:43:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-04-06 09:43:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 09:43:27,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:27,485 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:27,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:27,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:27,700 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1356528654, now seen corresponding path program 14 times [2022-04-06 09:43:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:27,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080215620] [2022-04-06 09:43:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:27,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:27,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080215620] [2022-04-06 09:43:27,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080215620] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:27,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264383108] [2022-04-06 09:43:27,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:43:27,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:27,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:27,796 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:27,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 09:43:27,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:43:27,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 09:43:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:27,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 09:43:28,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264383108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:28,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:28,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 17 [2022-04-06 09:43:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325265819] [2022-04-06 09:43:28,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:28,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 09:43:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 09:43:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-04-06 09:43:28,090 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 14 states have internal predecessors, (47), 9 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:28,365 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2022-04-06 09:43:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 09:43:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 14 states have internal predecessors, (47), 9 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 74 [2022-04-06 09:43:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:28,366 INFO L225 Difference]: With dead ends: 106 [2022-04-06 09:43:28,366 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 09:43:28,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-04-06 09:43:28,367 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 68 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:28,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 09:43:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-04-06 09:43:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-04-06 09:43:28,401 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 74 [2022-04-06 09:43:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:28,402 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-04-06 09:43:28,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 14 states have internal predecessors, (47), 9 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 09:43:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-04-06 09:43:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:28,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:28,402 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:28,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 09:43:28,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 09:43:28,615 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -112687606, now seen corresponding path program 15 times [2022-04-06 09:43:28,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73277504] [2022-04-06 09:43:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:28,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:28,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:28,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73277504] [2022-04-06 09:43:28,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73277504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:28,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30065756] [2022-04-06 09:43:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:43:28,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:28,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:28,807 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:28,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 09:43:28,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-06 09:43:28,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:28,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:28,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:29,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:29,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30065756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:29,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:29,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 09:43:29,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817721643] [2022-04-06 09:43:29,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:29,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 09:43:29,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:29,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 09:43:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1687, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 09:43:29,258 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:29,647 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2022-04-06 09:43:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 09:43:29,648 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:29,664 INFO L225 Difference]: With dead ends: 171 [2022-04-06 09:43:29,664 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 09:43:29,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=852, Invalid=3570, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 09:43:29,667 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:29,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 80 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 09:43:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2022-04-06 09:43:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:29,722 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:29,722 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:29,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 45 states have internal predecessors, (78), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:29,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:29,723 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:29,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:29,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 09:43:29,939 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash 305916298, now seen corresponding path program 22 times [2022-04-06 09:43:29,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:29,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605506127] [2022-04-06 09:43:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:29,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605506127] [2022-04-06 09:43:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605506127] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542798045] [2022-04-06 09:43:30,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:30,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:30,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:30,152 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:30,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 09:43:30,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:30,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:30,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542798045] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:30,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:30,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 45 [2022-04-06 09:43:30,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836254019] [2022-04-06 09:43:30,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:30,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 09:43:30,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 09:43:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 09:43:30,660 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:31,393 INFO L93 Difference]: Finished difference Result 206 states and 245 transitions. [2022-04-06 09:43:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 09:43:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:31,394 INFO L225 Difference]: With dead ends: 206 [2022-04-06 09:43:31,394 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 09:43:31,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1012, Invalid=4538, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 09:43:31,396 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:31,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 119 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:43:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 09:43:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 101. [2022-04-06 09:43:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:31,446 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:31,446 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:31,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:31,447 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:31,447 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:31,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:31,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 09:43:31,663 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash 596514314, now seen corresponding path program 23 times [2022-04-06 09:43:31,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:31,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446625069] [2022-04-06 09:43:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:31,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:31,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446625069] [2022-04-06 09:43:31,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446625069] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382655456] [2022-04-06 09:43:31,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:31,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:31,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:31,864 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:31,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 09:43:31,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-04-06 09:43:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:32,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:32,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382655456] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:32,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:32,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 44 [2022-04-06 09:43:32,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486546237] [2022-04-06 09:43:32,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:32,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 09:43:32,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 09:43:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 09:43:32,544 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:33,394 INFO L93 Difference]: Finished difference Result 240 states and 289 transitions. [2022-04-06 09:43:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 09:43:33,395 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:33,395 INFO L225 Difference]: With dead ends: 240 [2022-04-06 09:43:33,396 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 09:43:33,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1161, Invalid=5319, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 09:43:33,396 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:33,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 119 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:43:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 09:43:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 101. [2022-04-06 09:43:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:33,440 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:33,440 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:33,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:33,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:33,441 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:33,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:33,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:33,644 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1056679542, now seen corresponding path program 24 times [2022-04-06 09:43:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246600385] [2022-04-06 09:43:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:33,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246600385] [2022-04-06 09:43:33,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246600385] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:33,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547774821] [2022-04-06 09:43:33,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:43:33,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:33,826 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:33,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 09:43:33,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 09:43:33,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:33,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:34,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547774821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:34,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:34,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 43 [2022-04-06 09:43:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729620680] [2022-04-06 09:43:34,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:34,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 09:43:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 09:43:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 09:43:34,439 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:35,355 INFO L93 Difference]: Finished difference Result 273 states and 332 transitions. [2022-04-06 09:43:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 09:43:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:35,357 INFO L225 Difference]: With dead ends: 273 [2022-04-06 09:43:35,357 INFO L226 Difference]: Without dead ends: 238 [2022-04-06 09:43:35,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1271, Invalid=5869, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 09:43:35,358 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:35,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 99 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:43:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-04-06 09:43:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 101. [2022-04-06 09:43:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:35,403 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:35,403 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:35,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:35,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:35,405 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:35,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:35,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 09:43:35,617 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:35,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:35,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1106748938, now seen corresponding path program 25 times [2022-04-06 09:43:35,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:35,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143032558] [2022-04-06 09:43:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:35,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 94 proven. 42 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:35,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143032558] [2022-04-06 09:43:35,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143032558] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:35,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256672252] [2022-04-06 09:43:35,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:43:35,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:35,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:35,811 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:35,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 09:43:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:36,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:36,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256672252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:36,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:36,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 42 [2022-04-06 09:43:36,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093213709] [2022-04-06 09:43:36,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:36,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 09:43:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 09:43:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 09:43:36,459 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:37,303 INFO L93 Difference]: Finished difference Result 305 states and 374 transitions. [2022-04-06 09:43:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 09:43:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:37,304 INFO L225 Difference]: With dead ends: 305 [2022-04-06 09:43:37,304 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 09:43:37,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1330, Invalid=6152, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 09:43:37,305 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 128 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:37,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 96 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 09:43:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 101. [2022-04-06 09:43:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:37,351 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:37,352 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:37,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 states have internal predecessors, (74), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:37,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:37,353 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:37,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:37,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 09:43:37,568 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1730726282, now seen corresponding path program 26 times [2022-04-06 09:43:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:37,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346307476] [2022-04-06 09:43:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:37,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:37,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346307476] [2022-04-06 09:43:37,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346307476] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:37,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401114767] [2022-04-06 09:43:37,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:43:37,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:37,754 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:37,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 09:43:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:43:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:38,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:38,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401114767] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:38,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:38,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 41 [2022-04-06 09:43:38,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924823211] [2022-04-06 09:43:38,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:38,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 09:43:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:38,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 09:43:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 09:43:38,316 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:39,333 INFO L93 Difference]: Finished difference Result 336 states and 415 transitions. [2022-04-06 09:43:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 09:43:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:39,352 INFO L225 Difference]: With dead ends: 336 [2022-04-06 09:43:39,352 INFO L226 Difference]: Without dead ends: 301 [2022-04-06 09:43:39,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2468 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1332, Invalid=6150, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 09:43:39,355 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 153 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:39,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 82 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-04-06 09:43:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 101. [2022-04-06 09:43:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:39,426 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:39,426 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:39,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:39,427 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:39,427 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:39,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:39,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:39,643 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 226833930, now seen corresponding path program 27 times [2022-04-06 09:43:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:39,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603716572] [2022-04-06 09:43:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:39,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:39,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603716572] [2022-04-06 09:43:39,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603716572] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:39,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109716411] [2022-04-06 09:43:39,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:43:39,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:39,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:39,840 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:39,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 09:43:39,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-06 09:43:39,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:40,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:40,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109716411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:40,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:40,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 40 [2022-04-06 09:43:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556384770] [2022-04-06 09:43:40,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:40,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 09:43:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 09:43:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 09:43:40,427 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:41,406 INFO L93 Difference]: Finished difference Result 366 states and 455 transitions. [2022-04-06 09:43:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 09:43:41,407 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:41,408 INFO L225 Difference]: With dead ends: 366 [2022-04-06 09:43:41,408 INFO L226 Difference]: Without dead ends: 331 [2022-04-06 09:43:41,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1277, Invalid=5863, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 09:43:41,409 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 166 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:41,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-06 09:43:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 101. [2022-04-06 09:43:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:41,458 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:41,459 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:41,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:41,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:41,459 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:41,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:41,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 09:43:41,672 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 732510602, now seen corresponding path program 28 times [2022-04-06 09:43:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:41,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832957007] [2022-04-06 09:43:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:41,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832957007] [2022-04-06 09:43:41,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832957007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514640625] [2022-04-06 09:43:41,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:41,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:41,850 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:41,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 09:43:41,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:42,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:42,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514640625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:42,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:42,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 39 [2022-04-06 09:43:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808758441] [2022-04-06 09:43:42,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:42,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 09:43:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 09:43:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 09:43:42,271 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:43,126 INFO L93 Difference]: Finished difference Result 395 states and 494 transitions. [2022-04-06 09:43:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 09:43:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:43,127 INFO L225 Difference]: With dead ends: 395 [2022-04-06 09:43:43,127 INFO L226 Difference]: Without dead ends: 360 [2022-04-06 09:43:43,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1171, Invalid=5309, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 09:43:43,128 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 210 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:43,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 81 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-04-06 09:43:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 101. [2022-04-06 09:43:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.139240506329114) internal successors, (90), 80 states have internal predecessors, (90), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 09:43:43,179 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 09:43:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:43,179 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 09:43:43,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 38 states have internal predecessors, (71), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:43,179 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 09:43:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 09:43:43,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:43,180 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:43,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:43,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:43,395 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2134296074, now seen corresponding path program 8 times [2022-04-06 09:43:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:43,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239334106] [2022-04-06 09:43:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:43,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:43:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:43:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:43:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:43:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:43:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:43:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:43:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:43:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:43,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:43,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239334106] [2022-04-06 09:43:43,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239334106] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:43,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982022671] [2022-04-06 09:43:43,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:43:43,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:43,551 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:43,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 09:43:43,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:43:43,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 09:43:43,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:43,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:43,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982022671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:43,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:43,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 38 [2022-04-06 09:43:43,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20679283] [2022-04-06 09:43:43,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:43,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 09:43:43,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 09:43:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 09:43:43,941 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:44,713 INFO L93 Difference]: Finished difference Result 426 states and 536 transitions. [2022-04-06 09:43:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 09:43:44,713 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 81 [2022-04-06 09:43:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:44,715 INFO L225 Difference]: With dead ends: 426 [2022-04-06 09:43:44,715 INFO L226 Difference]: Without dead ends: 391 [2022-04-06 09:43:44,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1036, Invalid=4514, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 09:43:44,715 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 325 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:44,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 75 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-04-06 09:43:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 103. [2022-04-06 09:43:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 82 states have internal predecessors, (93), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:43:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2022-04-06 09:43:44,768 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 81 [2022-04-06 09:43:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:44,768 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2022-04-06 09:43:44,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:43:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2022-04-06 09:43:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 09:43:44,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:44,768 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:44,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:44,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 09:43:44,984 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 915939306, now seen corresponding path program 16 times [2022-04-06 09:43:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:44,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988665321] [2022-04-06 09:43:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 52 proven. 109 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988665321] [2022-04-06 09:43:45,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988665321] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984113186] [2022-04-06 09:43:45,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:45,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:45,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:45,080 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:45,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 09:43:45,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:45,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:45,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 09:43:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:45,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:43:45,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984113186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:45,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:45,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 18 [2022-04-06 09:43:45,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994710399] [2022-04-06 09:43:45,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:45,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 09:43:45,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 09:43:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-04-06 09:43:45,313 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 15 states have internal predecessors, (50), 10 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:45,560 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-04-06 09:43:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 09:43:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 15 states have internal predecessors, (50), 10 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 82 [2022-04-06 09:43:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:45,561 INFO L225 Difference]: With dead ends: 116 [2022-04-06 09:43:45,561 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 09:43:45,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-04-06 09:43:45,561 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:45,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 57 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 09:43:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2022-04-06 09:43:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-04-06 09:43:45,614 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 82 [2022-04-06 09:43:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:45,614 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-04-06 09:43:45,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 15 states have internal predecessors, (50), 10 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 09:43:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-04-06 09:43:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:45,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:45,615 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:45,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 09:43:45,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 09:43:45,831 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1550806354, now seen corresponding path program 17 times [2022-04-06 09:43:45,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:45,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289523331] [2022-04-06 09:43:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:45,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:46,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289523331] [2022-04-06 09:43:46,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289523331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004364918] [2022-04-06 09:43:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:46,052 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 09:43:46,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-04-06 09:43:46,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:46,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:46,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:46,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:46,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004364918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:46,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:46,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 09:43:46,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217939777] [2022-04-06 09:43:46,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:46,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 09:43:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 09:43:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 09:43:46,735 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 50 states, 50 states have (on average 1.68) internal successors, (84), 49 states have internal predecessors, (84), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:47,355 INFO L93 Difference]: Finished difference Result 188 states and 220 transitions. [2022-04-06 09:43:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 09:43:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 49 states have internal predecessors, (84), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:43:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:47,356 INFO L225 Difference]: With dead ends: 188 [2022-04-06 09:43:47,356 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 09:43:47,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1001, Invalid=4255, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 09:43:47,357 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:47,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 86 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 09:43:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2022-04-06 09:43:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:43:47,415 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:43:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:47,415 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:43:47,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 49 states have internal predecessors, (84), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:43:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:47,415 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:47,416 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:47,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:47,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:47,632 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1297582546, now seen corresponding path program 29 times [2022-04-06 09:43:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212581870] [2022-04-06 09:43:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:47,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212581870] [2022-04-06 09:43:47,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212581870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922887636] [2022-04-06 09:43:47,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:47,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:47,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:47,810 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:47,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 09:43:47,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-04-06 09:43:47,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:48,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:48,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922887636] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:48,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:48,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 49 [2022-04-06 09:43:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031492899] [2022-04-06 09:43:48,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:48,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 09:43:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:48,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 09:43:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1930, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 09:43:48,404 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 49 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 48 states have internal predecessors, (83), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:49,022 INFO L93 Difference]: Finished difference Result 227 states and 270 transitions. [2022-04-06 09:43:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 09:43:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 48 states have internal predecessors, (83), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:43:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:49,023 INFO L225 Difference]: With dead ends: 227 [2022-04-06 09:43:49,023 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 09:43:49,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1199, Invalid=5443, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 09:43:49,024 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:49,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 95 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 09:43:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 111. [2022-04-06 09:43:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:43:49,087 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:43:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:49,087 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:43:49,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 48 states have internal predecessors, (83), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:43:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:49,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:49,088 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:49,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:49,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:49,303 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash 927343278, now seen corresponding path program 30 times [2022-04-06 09:43:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:49,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016623981] [2022-04-06 09:43:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:49,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016623981] [2022-04-06 09:43:49,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016623981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:49,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136667807] [2022-04-06 09:43:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:43:49,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:49,458 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:49,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 09:43:49,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 09:43:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:49,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:49,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136667807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:49,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:49,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 48 [2022-04-06 09:43:49,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124751456] [2022-04-06 09:43:49,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:49,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 09:43:49,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:49,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 09:43:49,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1861, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 09:43:49,903 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:50,613 INFO L93 Difference]: Finished difference Result 265 states and 319 transitions. [2022-04-06 09:43:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 09:43:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:43:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:50,614 INFO L225 Difference]: With dead ends: 265 [2022-04-06 09:43:50,614 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 09:43:50,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1390, Invalid=6442, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 09:43:50,616 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 87 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:50,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 87 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 09:43:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 111. [2022-04-06 09:43:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:43:50,687 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:43:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:50,687 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:43:50,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 47 states have internal predecessors, (82), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:43:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:50,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:50,688 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:50,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 09:43:50,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:50,894 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash 167831086, now seen corresponding path program 31 times [2022-04-06 09:43:50,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:50,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777603075] [2022-04-06 09:43:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:51,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:51,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777603075] [2022-04-06 09:43:51,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777603075] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:51,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393751301] [2022-04-06 09:43:51,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:43:51,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:51,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:51,097 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:51,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 09:43:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:51,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:51,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393751301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:51,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:51,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 47 [2022-04-06 09:43:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596645150] [2022-04-06 09:43:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:51,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 09:43:51,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 09:43:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 09:43:51,582 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:52,431 INFO L93 Difference]: Finished difference Result 302 states and 367 transitions. [2022-04-06 09:43:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 09:43:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:43:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:52,432 INFO L225 Difference]: With dead ends: 302 [2022-04-06 09:43:52,432 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 09:43:52,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=7200, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 09:43:52,433 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:52,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 86 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 09:43:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 111. [2022-04-06 09:43:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:43:52,517 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:43:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:52,517 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:43:52,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:43:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:52,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:52,518 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:52,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 09:43:52,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 09:43:52,734 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1528804014, now seen corresponding path program 32 times [2022-04-06 09:43:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236382478] [2022-04-06 09:43:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:52,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:52,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236382478] [2022-04-06 09:43:52,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236382478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:52,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700151525] [2022-04-06 09:43:52,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:43:52,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:52,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:52,948 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:52,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 09:43:52,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:43:52,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:52,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:53,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:53,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700151525] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:53,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:53,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 46 [2022-04-06 09:43:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264728500] [2022-04-06 09:43:53,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:53,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 09:43:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 09:43:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1717, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 09:43:53,670 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:54,861 INFO L93 Difference]: Finished difference Result 338 states and 414 transitions. [2022-04-06 09:43:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 09:43:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:43:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:54,862 INFO L225 Difference]: With dead ends: 338 [2022-04-06 09:43:54,862 INFO L226 Difference]: Without dead ends: 300 [2022-04-06 09:43:54,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1640, Invalid=7672, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 09:43:54,864 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 124 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:54,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 96 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:43:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-04-06 09:43:54,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 111. [2022-04-06 09:43:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:43:54,938 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:43:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:54,939 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:43:54,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:43:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:54,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:54,939 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:54,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:55,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 09:43:55,155 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1018517038, now seen corresponding path program 33 times [2022-04-06 09:43:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:55,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348081987] [2022-04-06 09:43:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348081987] [2022-04-06 09:43:55,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348081987] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490533167] [2022-04-06 09:43:55,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:43:55,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:55,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:55,380 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:55,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 09:43:55,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-06 09:43:55,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:55,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:55,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:55,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:56,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490533167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:56,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:56,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 45 [2022-04-06 09:43:56,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291722568] [2022-04-06 09:43:56,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:56,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 09:43:56,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 09:43:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 09:43:56,084 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:57,159 INFO L93 Difference]: Finished difference Result 373 states and 460 transitions. [2022-04-06 09:43:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 09:43:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:43:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:57,160 INFO L225 Difference]: With dead ends: 373 [2022-04-06 09:43:57,160 INFO L226 Difference]: Without dead ends: 335 [2022-04-06 09:43:57,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1675, Invalid=7831, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 09:43:57,161 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 156 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:57,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 72 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-04-06 09:43:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 111. [2022-04-06 09:43:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:43:57,232 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:43:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:57,232 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:43:57,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:43:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:57,232 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:57,232 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:57,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:57,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:57,448 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -937606482, now seen corresponding path program 34 times [2022-04-06 09:43:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569792389] [2022-04-06 09:43:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:57,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:57,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569792389] [2022-04-06 09:43:57,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569792389] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:57,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64076908] [2022-04-06 09:43:57,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:57,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:57,678 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 09:43:57,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:57,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:57,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:57,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:58,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:58,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64076908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:58,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:58,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 44 [2022-04-06 09:43:58,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653353266] [2022-04-06 09:43:58,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:58,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 09:43:58,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:58,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 09:43:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 09:43:58,258 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 states have internal predecessors, (78), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:59,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:59,327 INFO L93 Difference]: Finished difference Result 407 states and 505 transitions. [2022-04-06 09:43:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 09:43:59,328 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 states have internal predecessors, (78), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:43:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:59,329 INFO L225 Difference]: With dead ends: 407 [2022-04-06 09:43:59,329 INFO L226 Difference]: Without dead ends: 369 [2022-04-06 09:43:59,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1644, Invalid=7668, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 09:43:59,330 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 214 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:59,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 96 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-04-06 09:43:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 111. [2022-04-06 09:43:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:43:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:43:59,413 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:43:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:59,413 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:43:59,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 states have internal predecessors, (78), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:43:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:43:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:43:59,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:59,413 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:59,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:59,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:59,628 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:59,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1908786734, now seen corresponding path program 35 times [2022-04-06 09:43:59,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:59,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691192937] [2022-04-06 09:43:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:59,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:43:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:43:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:43:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:43:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:43:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:43:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:43:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:43:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:43:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:43:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691192937] [2022-04-06 09:43:59,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691192937] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343704087] [2022-04-06 09:43:59,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:59,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:59,811 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:43:59,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 09:43:59,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-04-06 09:43:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:43:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:00,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:00,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343704087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:00,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:00,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 43 [2022-04-06 09:44:00,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652386306] [2022-04-06 09:44:00,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:00,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 09:44:00,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:00,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 09:44:00,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 09:44:00,228 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:44:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:01,420 INFO L93 Difference]: Finished difference Result 440 states and 549 transitions. [2022-04-06 09:44:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 09:44:01,420 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:44:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:01,421 INFO L225 Difference]: With dead ends: 440 [2022-04-06 09:44:01,421 INFO L226 Difference]: Without dead ends: 402 [2022-04-06 09:44:01,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1550, Invalid=7192, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 09:44:01,422 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:01,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 90 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-04-06 09:44:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 111. [2022-04-06 09:44:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:44:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:44:01,505 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:44:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:01,505 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:44:01,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:44:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:44:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:44:01,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:01,506 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:01,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:01,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:01,715 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:01,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2000605870, now seen corresponding path program 36 times [2022-04-06 09:44:01,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:01,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951990969] [2022-04-06 09:44:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:44:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:44:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:44:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:44:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:44:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:44:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:44:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:44:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:44:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:01,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951990969] [2022-04-06 09:44:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951990969] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497358800] [2022-04-06 09:44:01,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:44:01,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:01,919 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:01,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 09:44:01,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 09:44:01,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:44:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:02,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:02,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497358800] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:02,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:02,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 42 [2022-04-06 09:44:02,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656424998] [2022-04-06 09:44:02,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:02,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 09:44:02,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 09:44:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 09:44:02,437 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:44:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:03,514 INFO L93 Difference]: Finished difference Result 472 states and 592 transitions. [2022-04-06 09:44:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 09:44:03,514 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:44:03,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:03,515 INFO L225 Difference]: With dead ends: 472 [2022-04-06 09:44:03,516 INFO L226 Difference]: Without dead ends: 434 [2022-04-06 09:44:03,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1402, Invalid=6430, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 09:44:03,516 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 245 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:03,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 83 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-04-06 09:44:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 111. [2022-04-06 09:44:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:44:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-04-06 09:44:03,601 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 89 [2022-04-06 09:44:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:03,601 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-04-06 09:44:03,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:44:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-04-06 09:44:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 09:44:03,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:03,602 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:03,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:03,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:03,816 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1875757522, now seen corresponding path program 9 times [2022-04-06 09:44:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:03,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895566770] [2022-04-06 09:44:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:03,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:44:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:44:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:44:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:44:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:44:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:44:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:44:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:44:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:44:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895566770] [2022-04-06 09:44:04,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895566770] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57121795] [2022-04-06 09:44:04,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:44:04,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:04,022 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:04,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 09:44:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-06 09:44:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 09:44:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:04,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:04,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57121795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:04,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:04,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 41 [2022-04-06 09:44:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535180109] [2022-04-06 09:44:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:04,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 09:44:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 09:44:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 09:44:04,443 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:44:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:05,653 INFO L93 Difference]: Finished difference Result 506 states and 638 transitions. [2022-04-06 09:44:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 09:44:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 89 [2022-04-06 09:44:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:05,655 INFO L225 Difference]: With dead ends: 506 [2022-04-06 09:44:05,655 INFO L226 Difference]: Without dead ends: 468 [2022-04-06 09:44:05,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1226, Invalid=5416, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 09:44:05,656 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 288 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:05,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 81 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-04-06 09:44:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 113. [2022-04-06 09:44:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:44:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2022-04-06 09:44:05,746 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 89 [2022-04-06 09:44:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:05,746 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2022-04-06 09:44:05,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 21 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 09:44:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2022-04-06 09:44:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 09:44:05,747 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:05,747 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:05,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:05,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 09:44:05,963 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1005040498, now seen corresponding path program 18 times [2022-04-06 09:44:05,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:05,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141321014] [2022-04-06 09:44:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:05,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 63 proven. 136 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:06,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:06,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141321014] [2022-04-06 09:44:06,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141321014] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:06,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512834020] [2022-04-06 09:44:06,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:44:06,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:06,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:06,082 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:06,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 09:44:06,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 09:44:06,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 09:44:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:06,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 09:44:06,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512834020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:06,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:06,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 19 [2022-04-06 09:44:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588115655] [2022-04-06 09:44:06,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:06,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 09:44:06,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 09:44:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-04-06 09:44:06,429 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:44:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:06,806 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2022-04-06 09:44:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 09:44:06,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 90 [2022-04-06 09:44:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:06,806 INFO L225 Difference]: With dead ends: 126 [2022-04-06 09:44:06,806 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 09:44:06,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 09:44:06,807 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 71 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:06,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 74 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 09:44:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2022-04-06 09:44:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-04-06 09:44:06,896 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 90 [2022-04-06 09:44:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:06,896 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-04-06 09:44:06,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:44:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-04-06 09:44:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:06,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:06,896 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:06,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 09:44:07,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:07,112 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 638035338, now seen corresponding path program 19 times [2022-04-06 09:44:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:07,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155068939] [2022-04-06 09:44:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:07,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:07,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155068939] [2022-04-06 09:44:07,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155068939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731996812] [2022-04-06 09:44:07,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:44:07,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:07,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:07,367 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:07,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 09:44:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:08,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:08,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731996812] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:08,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:08,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 09:44:08,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484800635] [2022-04-06 09:44:08,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:08,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 09:44:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 09:44:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:44:08,187 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:08,976 INFO L93 Difference]: Finished difference Result 205 states and 240 transitions. [2022-04-06 09:44:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 09:44:08,977 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:08,977 INFO L225 Difference]: With dead ends: 205 [2022-04-06 09:44:08,978 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 09:44:08,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1162, Invalid=5000, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 09:44:08,978 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:08,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 82 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 09:44:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2022-04-06 09:44:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:09,068 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:09,069 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:09,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:09,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:09,069 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:09,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 09:44:09,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 09:44:09,283 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash -20707062, now seen corresponding path program 37 times [2022-04-06 09:44:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:09,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028926698] [2022-04-06 09:44:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:09,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:09,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028926698] [2022-04-06 09:44:09,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028926698] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:09,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791408805] [2022-04-06 09:44:09,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:44:09,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:09,527 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:09,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 09:44:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:10,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:10,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791408805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:10,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:10,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 53 [2022-04-06 09:44:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754331860] [2022-04-06 09:44:10,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:10,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 09:44:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 09:44:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2261, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 09:44:10,378 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:11,486 INFO L93 Difference]: Finished difference Result 248 states and 295 transitions. [2022-04-06 09:44:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 09:44:11,486 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:11,487 INFO L225 Difference]: With dead ends: 248 [2022-04-06 09:44:11,487 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 09:44:11,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1402, Invalid=6430, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 09:44:11,488 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:11,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 111 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 09:44:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 121. [2022-04-06 09:44:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:11,610 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:11,610 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:11,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.679245283018868) internal successors, (89), 52 states have internal predecessors, (89), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:11,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:11,611 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:11,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:11,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 09:44:11,827 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:11,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1288882806, now seen corresponding path program 38 times [2022-04-06 09:44:11,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685599739] [2022-04-06 09:44:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:11,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685599739] [2022-04-06 09:44:12,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685599739] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769395948] [2022-04-06 09:44:12,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:44:12,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:12,067 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:12,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 09:44:12,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:44:12,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:12,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:12,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769395948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:12,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:12,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 52 [2022-04-06 09:44:12,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754915126] [2022-04-06 09:44:12,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:12,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 09:44:12,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 09:44:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=2187, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 09:44:12,899 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 52 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 51 states have internal predecessors, (88), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:14,109 INFO L93 Difference]: Finished difference Result 290 states and 349 transitions. [2022-04-06 09:44:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 09:44:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 51 states have internal predecessors, (88), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:14,110 INFO L225 Difference]: With dead ends: 290 [2022-04-06 09:44:14,110 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 09:44:14,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3074 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1640, Invalid=7672, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 09:44:14,111 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:14,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 82 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 09:44:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 121. [2022-04-06 09:44:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:14,212 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:14,212 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:14,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 51 states have internal predecessors, (88), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:14,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:14,213 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:14,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:14,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 09:44:14,429 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1856796938, now seen corresponding path program 39 times [2022-04-06 09:44:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884820860] [2022-04-06 09:44:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:14,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884820860] [2022-04-06 09:44:14,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884820860] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958510443] [2022-04-06 09:44:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:44:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:14,668 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 09:44:14,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-06 09:44:14,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:14,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:15,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958510443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:15,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:15,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 51 [2022-04-06 09:44:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953486963] [2022-04-06 09:44:15,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:15,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 09:44:15,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 09:44:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 09:44:15,327 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 51 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 50 states have internal predecessors, (87), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:16,470 INFO L93 Difference]: Finished difference Result 331 states and 402 transitions. [2022-04-06 09:44:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 09:44:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 50 states have internal predecessors, (87), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:16,472 INFO L225 Difference]: With dead ends: 331 [2022-04-06 09:44:16,472 INFO L226 Difference]: Without dead ends: 290 [2022-04-06 09:44:16,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1840, Invalid=8666, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 09:44:16,473 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 96 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:16,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 101 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-04-06 09:44:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 121. [2022-04-06 09:44:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:16,578 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:16,579 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:16,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 50 states have internal predecessors, (87), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:16,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:16,579 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:16,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:16,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 09:44:16,795 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1819723146, now seen corresponding path program 40 times [2022-04-06 09:44:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193355850] [2022-04-06 09:44:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:16,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:17,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193355850] [2022-04-06 09:44:17,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193355850] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307436921] [2022-04-06 09:44:17,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:44:17,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:17,029 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:17,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 09:44:17,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:44:17,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:17,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:17,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307436921] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:17,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:17,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 50 [2022-04-06 09:44:17,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25368990] [2022-04-06 09:44:17,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:17,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 09:44:17,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 09:44:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 09:44:17,608 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:19,168 INFO L93 Difference]: Finished difference Result 371 states and 454 transitions. [2022-04-06 09:44:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 09:44:19,168 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:19,169 INFO L225 Difference]: With dead ends: 371 [2022-04-06 09:44:19,169 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 09:44:19,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3849 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1984, Invalid=9358, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 09:44:19,170 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 131 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:19,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 128 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:44:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 09:44:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 121. [2022-04-06 09:44:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:19,274 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:19,274 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:19,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:19,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:19,275 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:19,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 09:44:19,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:19,491 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:19,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1645156086, now seen corresponding path program 41 times [2022-04-06 09:44:19,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:19,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676227090] [2022-04-06 09:44:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:19,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 147 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:19,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676227090] [2022-04-06 09:44:19,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676227090] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642481748] [2022-04-06 09:44:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:44:19,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:19,724 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:19,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 09:44:19,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-04-06 09:44:19,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:20,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:20,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642481748] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:20,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:20,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 49 [2022-04-06 09:44:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537862737] [2022-04-06 09:44:20,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:20,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 09:44:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 09:44:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1953, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 09:44:20,462 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:22,114 INFO L93 Difference]: Finished difference Result 410 states and 505 transitions. [2022-04-06 09:44:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 09:44:22,115 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:22,116 INFO L225 Difference]: With dead ends: 410 [2022-04-06 09:44:22,116 INFO L226 Difference]: Without dead ends: 369 [2022-04-06 09:44:22,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4036 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2060, Invalid=9712, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 09:44:22,118 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 182 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:22,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 83 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-04-06 09:44:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 121. [2022-04-06 09:44:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:22,279 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:22,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:22,279 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:22,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:22,280 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:22,280 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:22,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:22,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:22,496 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash 182736266, now seen corresponding path program 42 times [2022-04-06 09:44:22,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372490766] [2022-04-06 09:44:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:22,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:22,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372490766] [2022-04-06 09:44:22,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372490766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487972790] [2022-04-06 09:44:22,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:44:22,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:22,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:22,728 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:22,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 09:44:22,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 09:44:22,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:23,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:23,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487972790] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:23,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:23,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 48 [2022-04-06 09:44:23,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790070884] [2022-04-06 09:44:23,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:23,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 09:44:23,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:23,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 09:44:23,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 09:44:23,483 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 48 states, 48 states have (on average 1.75) internal successors, (84), 47 states have internal predecessors, (84), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:25,219 INFO L93 Difference]: Finished difference Result 448 states and 555 transitions. [2022-04-06 09:44:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 09:44:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 47 states have internal predecessors, (84), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:25,220 INFO L225 Difference]: With dead ends: 448 [2022-04-06 09:44:25,220 INFO L226 Difference]: Without dead ends: 407 [2022-04-06 09:44:25,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2062, Invalid=9710, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 09:44:25,221 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 179 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:25,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 101 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-04-06 09:44:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 121. [2022-04-06 09:44:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:25,336 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:25,336 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:25,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 47 states have internal predecessors, (84), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:25,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:25,336 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:25,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:25,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:25,553 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1282320118, now seen corresponding path program 43 times [2022-04-06 09:44:25,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:25,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333030677] [2022-04-06 09:44:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:25,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333030677] [2022-04-06 09:44:25,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333030677] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407856706] [2022-04-06 09:44:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:44:25,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:25,732 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:25,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 09:44:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:25,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:26,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:26,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407856706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:26,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:26,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 47 [2022-04-06 09:44:26,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16611465] [2022-04-06 09:44:26,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:26,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 09:44:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 09:44:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 09:44:26,203 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:27,827 INFO L93 Difference]: Finished difference Result 485 states and 604 transitions. [2022-04-06 09:44:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 09:44:27,828 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:27,829 INFO L225 Difference]: With dead ends: 485 [2022-04-06 09:44:27,829 INFO L226 Difference]: Without dead ends: 444 [2022-04-06 09:44:27,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1990, Invalid=9352, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 09:44:27,830 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 188 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:27,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 93 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-04-06 09:44:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 121. [2022-04-06 09:44:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:27,949 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:27,950 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:27,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:27,950 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:27,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:27,950 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:27,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:28,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 09:44:28,166 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2022316662, now seen corresponding path program 44 times [2022-04-06 09:44:28,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:28,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073843210] [2022-04-06 09:44:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:28,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:28,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073843210] [2022-04-06 09:44:28,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073843210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341455178] [2022-04-06 09:44:28,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:44:28,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:28,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:28,403 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:28,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 09:44:28,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:44:28,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:28,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:28,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:28,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:29,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341455178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:29,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:29,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 46 [2022-04-06 09:44:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133122394] [2022-04-06 09:44:29,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:29,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 09:44:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 09:44:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 09:44:29,080 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:30,737 INFO L93 Difference]: Finished difference Result 521 states and 652 transitions. [2022-04-06 09:44:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 09:44:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:30,738 INFO L225 Difference]: With dead ends: 521 [2022-04-06 09:44:30,738 INFO L226 Difference]: Without dead ends: 480 [2022-04-06 09:44:30,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1850, Invalid=8656, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 09:44:30,739 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 267 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:30,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 98 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-04-06 09:44:30,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 121. [2022-04-06 09:44:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:30,854 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:30,854 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:30,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:30,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:30,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:30,855 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:30,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:31,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:31,075 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:31,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1769092854, now seen corresponding path program 45 times [2022-04-06 09:44:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:31,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905059448] [2022-04-06 09:44:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:31,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:31,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905059448] [2022-04-06 09:44:31,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905059448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304219053] [2022-04-06 09:44:31,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:44:31,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:31,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:31,315 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:31,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 09:44:31,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-06 09:44:31,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:31,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:31,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304219053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:31,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:31,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 45 [2022-04-06 09:44:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474799019] [2022-04-06 09:44:31,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:31,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 09:44:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 09:44:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 09:44:31,940 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:33,593 INFO L93 Difference]: Finished difference Result 556 states and 699 transitions. [2022-04-06 09:44:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 09:44:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:33,594 INFO L225 Difference]: With dead ends: 556 [2022-04-06 09:44:33,594 INFO L226 Difference]: Without dead ends: 515 [2022-04-06 09:44:33,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1654, Invalid=7658, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 09:44:33,595 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 285 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:33,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 82 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-04-06 09:44:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 121. [2022-04-06 09:44:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-04-06 09:44:33,709 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-04-06 09:44:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:33,709 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-04-06 09:44:33,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-04-06 09:44:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 09:44:33,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:33,710 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:33,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:33,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:33,926 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash 455832970, now seen corresponding path program 10 times [2022-04-06 09:44:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662843823] [2022-04-06 09:44:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 09:44:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:44:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:44:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:44:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:44:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:44:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:44:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:44:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:44:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:44:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:34,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:34,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662843823] [2022-04-06 09:44:34,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662843823] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:34,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003601835] [2022-04-06 09:44:34,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:44:34,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:34,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:34,104 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:34,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 09:44:34,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:44:34,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:44:34,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:34,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:34,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003601835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:34,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 44 [2022-04-06 09:44:34,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503940423] [2022-04-06 09:44:34,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:34,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 09:44:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 09:44:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 09:44:34,671 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:36,389 INFO L93 Difference]: Finished difference Result 593 states and 749 transitions. [2022-04-06 09:44:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 09:44:36,389 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 97 [2022-04-06 09:44:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:36,391 INFO L225 Difference]: With dead ends: 593 [2022-04-06 09:44:36,391 INFO L226 Difference]: Without dead ends: 552 [2022-04-06 09:44:36,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2492 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1432, Invalid=6400, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 09:44:36,392 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 320 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:36,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 101 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-04-06 09:44:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 123. [2022-04-06 09:44:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:44:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2022-04-06 09:44:36,509 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 97 [2022-04-06 09:44:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:36,509 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2022-04-06 09:44:36,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 09:44:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2022-04-06 09:44:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 09:44:36,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:36,509 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:36,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:36,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 09:44:36,725 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash -5800086, now seen corresponding path program 20 times [2022-04-06 09:44:36,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:36,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135267986] [2022-04-06 09:44:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 75 proven. 166 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:36,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135267986] [2022-04-06 09:44:36,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135267986] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:36,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519600262] [2022-04-06 09:44:36,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:44:36,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:36,849 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:36,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 09:44:36,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:44:36,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 09:44:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:37,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:44:37,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519600262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:37,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:37,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 20 [2022-04-06 09:44:37,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072169208] [2022-04-06 09:44:37,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:37,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 09:44:37,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:37,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 09:44:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-04-06 09:44:37,210 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 12 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:44:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:37,598 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2022-04-06 09:44:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 09:44:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 12 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 98 [2022-04-06 09:44:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:37,599 INFO L225 Difference]: With dead ends: 136 [2022-04-06 09:44:37,599 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 09:44:37,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 09:44:37,600 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:37,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 66 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 09:44:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2022-04-06 09:44:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2022-04-06 09:44:37,716 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 98 [2022-04-06 09:44:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:37,716 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2022-04-06 09:44:37,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 12 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 09:44:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2022-04-06 09:44:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:37,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:37,717 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:37,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:37,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 09:44:37,932 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -606158034, now seen corresponding path program 21 times [2022-04-06 09:44:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:37,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141633330] [2022-04-06 09:44:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:38,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141633330] [2022-04-06 09:44:38,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141633330] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:38,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310283969] [2022-04-06 09:44:38,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:44:38,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:38,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:38,214 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:38,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 09:44:38,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-04-06 09:44:38,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:39,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:39,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310283969] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:39,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:39,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 09:44:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871181813] [2022-04-06 09:44:39,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:39,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 09:44:39,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 09:44:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 09:44:39,189 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 58 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 57 states have internal predecessors, (96), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:40,193 INFO L93 Difference]: Finished difference Result 222 states and 260 transitions. [2022-04-06 09:44:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 09:44:40,194 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 57 states have internal predecessors, (96), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:44:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:40,195 INFO L225 Difference]: With dead ends: 222 [2022-04-06 09:44:40,195 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 09:44:40,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1335, Invalid=5805, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 09:44:40,195 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:40,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 104 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 09:44:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2022-04-06 09:44:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:44:40,333 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:44:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:40,333 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:44:40,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 57 states have internal predecessors, (96), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:44:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:40,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:40,333 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:40,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:40,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:40,547 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash -775969106, now seen corresponding path program 46 times [2022-04-06 09:44:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490561334] [2022-04-06 09:44:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:40,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490561334] [2022-04-06 09:44:40,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490561334] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955593105] [2022-04-06 09:44:40,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:44:40,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:40,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:40,823 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:40,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 09:44:40,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:44:40,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:40,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:40,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:41,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:41,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955593105] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:41,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:41,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 57 [2022-04-06 09:44:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148299845] [2022-04-06 09:44:41,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:41,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 09:44:41,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:41,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 09:44:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2618, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 09:44:41,772 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:42,980 INFO L93 Difference]: Finished difference Result 269 states and 320 transitions. [2022-04-06 09:44:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 09:44:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:44:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:42,989 INFO L225 Difference]: With dead ends: 269 [2022-04-06 09:44:42,989 INFO L226 Difference]: Without dead ends: 225 [2022-04-06 09:44:42,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2990 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1621, Invalid=7499, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 09:44:42,990 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:42,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 93 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-04-06 09:44:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 131. [2022-04-06 09:44:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:44:43,129 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:44:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:43,129 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:44:43,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:44:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:43,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:43,130 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:43,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:43,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:43,346 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -227257554, now seen corresponding path program 47 times [2022-04-06 09:44:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:43,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205971471] [2022-04-06 09:44:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:43,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205971471] [2022-04-06 09:44:43,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205971471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922437489] [2022-04-06 09:44:43,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:44:43,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:43,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:43,619 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:43,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 09:44:43,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-04-06 09:44:43,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:43,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:44,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:44,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922437489] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:44,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:44,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 56 [2022-04-06 09:44:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340735152] [2022-04-06 09:44:44,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:44,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 09:44:44,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 09:44:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2539, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 09:44:44,314 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:45,518 INFO L93 Difference]: Finished difference Result 315 states and 379 transitions. [2022-04-06 09:44:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 09:44:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:44:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:45,520 INFO L225 Difference]: With dead ends: 315 [2022-04-06 09:44:45,520 INFO L226 Difference]: Without dead ends: 271 [2022-04-06 09:44:45,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3649 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1911, Invalid=9009, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 09:44:45,521 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:45,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 93 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:44:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-04-06 09:44:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 131. [2022-04-06 09:44:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:44:45,665 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:44:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:45,665 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:44:45,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:44:45,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:45,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:45,666 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:45,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:45,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:45,882 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash -902293842, now seen corresponding path program 48 times [2022-04-06 09:44:45,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:45,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869530220] [2022-04-06 09:44:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:45,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:46,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:46,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869530220] [2022-04-06 09:44:46,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869530220] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:46,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29067310] [2022-04-06 09:44:46,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:44:46,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:46,051 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:46,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 09:44:46,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 09:44:46,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:46,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:46,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:46,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29067310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:46,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:46,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 55 [2022-04-06 09:44:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466818420] [2022-04-06 09:44:46,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:46,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 09:44:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 09:44:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=2458, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 09:44:46,693 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 55 states, 55 states have (on average 1.690909090909091) internal successors, (93), 54 states have internal predecessors, (93), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:48,296 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2022-04-06 09:44:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 09:44:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.690909090909091) internal successors, (93), 54 states have internal predecessors, (93), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:44:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:48,297 INFO L225 Difference]: With dead ends: 360 [2022-04-06 09:44:48,297 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 09:44:48,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2165, Invalid=10267, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 09:44:48,298 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:48,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 83 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 09:44:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 131. [2022-04-06 09:44:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:44:48,447 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:44:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:48,447 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:44:48,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.690909090909091) internal successors, (93), 54 states have internal predecessors, (93), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:44:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:48,448 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:48,448 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:48,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:48,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:48,664 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash -785521874, now seen corresponding path program 49 times [2022-04-06 09:44:48,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:48,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889205544] [2022-04-06 09:44:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:48,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:48,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:48,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889205544] [2022-04-06 09:44:48,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889205544] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:48,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383272687] [2022-04-06 09:44:48,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:44:48,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:48,932 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:48,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 09:44:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:48,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:49,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:49,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383272687] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:49,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:49,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 54 [2022-04-06 09:44:49,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490848987] [2022-04-06 09:44:49,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:49,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 09:44:49,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 09:44:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=2375, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:44:49,832 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 53 states have internal predecessors, (92), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:51,595 INFO L93 Difference]: Finished difference Result 404 states and 494 transitions. [2022-04-06 09:44:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 09:44:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 53 states have internal predecessors, (92), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:44:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:51,597 INFO L225 Difference]: With dead ends: 404 [2022-04-06 09:44:51,597 INFO L226 Difference]: Without dead ends: 360 [2022-04-06 09:44:51,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2362, Invalid=11210, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 09:44:51,598 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 141 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:51,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 83 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-04-06 09:44:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 131. [2022-04-06 09:44:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:44:51,759 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:44:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:51,759 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:44:51,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 53 states have internal predecessors, (92), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:44:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:51,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:51,760 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:51,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:51,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:51,975 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:51,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1712096942, now seen corresponding path program 50 times [2022-04-06 09:44:51,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:51,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758913192] [2022-04-06 09:44:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:51,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:52,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:52,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758913192] [2022-04-06 09:44:52,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758913192] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:52,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571544422] [2022-04-06 09:44:52,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:44:52,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:52,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:52,267 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:52,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 09:44:52,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:44:52,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:52,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:52,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:52,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571544422] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:52,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:52,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 53 [2022-04-06 09:44:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666827426] [2022-04-06 09:44:52,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:52,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 09:44:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 09:44:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=2290, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 09:44:52,873 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:54,669 INFO L93 Difference]: Finished difference Result 447 states and 550 transitions. [2022-04-06 09:44:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 09:44:54,669 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:44:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:54,670 INFO L225 Difference]: With dead ends: 447 [2022-04-06 09:44:54,670 INFO L226 Difference]: Without dead ends: 403 [2022-04-06 09:44:54,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4965 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2487, Invalid=11793, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 09:44:54,671 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 191 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:54,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 94 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-04-06 09:44:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 131. [2022-04-06 09:44:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:44:54,824 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:44:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:54,824 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:44:54,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:44:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:54,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:54,824 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:54,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 09:44:55,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 09:44:55,026 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:55,026 INFO L85 PathProgramCache]: Analyzing trace with hash 822833966, now seen corresponding path program 51 times [2022-04-06 09:44:55,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:55,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285614676] [2022-04-06 09:44:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:55,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:55,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285614676] [2022-04-06 09:44:55,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285614676] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:55,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943390029] [2022-04-06 09:44:55,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:44:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:55,282 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:55,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 09:44:55,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-04-06 09:44:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:55,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:55,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943390029] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:55,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:55,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 52 [2022-04-06 09:44:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919944505] [2022-04-06 09:44:55,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:55,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 09:44:55,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 09:44:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2203, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 09:44:55,849 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 52 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:57,811 INFO L93 Difference]: Finished difference Result 489 states and 605 transitions. [2022-04-06 09:44:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 09:44:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:44:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:57,812 INFO L225 Difference]: With dead ends: 489 [2022-04-06 09:44:57,812 INFO L226 Difference]: Without dead ends: 445 [2022-04-06 09:44:57,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5093 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2531, Invalid=11989, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 09:44:57,813 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 172 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:57,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 107 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:44:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-04-06 09:44:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 131. [2022-04-06 09:44:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:44:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:44:57,970 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:44:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:57,971 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:44:57,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:44:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:44:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:44:57,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:57,972 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:57,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:58,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:58,187 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -868419922, now seen corresponding path program 52 times [2022-04-06 09:44:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459773896] [2022-04-06 09:44:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:44:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:44:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:44:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:44:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:44:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:44:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:44:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:44:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:44:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:44:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:44:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:58,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:58,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459773896] [2022-04-06 09:44:58,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459773896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:58,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625177475] [2022-04-06 09:44:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:44:58,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:58,484 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:44:58,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 09:44:58,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:44:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:44:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:44:58,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:59,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:44:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:44:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625177475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:44:59,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:44:59,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 51 [2022-04-06 09:44:59,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284367742] [2022-04-06 09:44:59,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:44:59,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 09:44:59,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 09:44:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2114, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 09:44:59,314 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 50 states have internal predecessors, (89), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:01,332 INFO L93 Difference]: Finished difference Result 530 states and 659 transitions. [2022-04-06 09:45:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 09:45:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 50 states have internal predecessors, (89), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:45:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:01,334 INFO L225 Difference]: With dead ends: 530 [2022-04-06 09:45:01,334 INFO L226 Difference]: Without dead ends: 486 [2022-04-06 09:45:01,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5039 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2491, Invalid=11789, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 09:45:01,334 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:01,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 107 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-04-06 09:45:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 131. [2022-04-06 09:45:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:45:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:45:01,489 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:45:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:01,489 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:45:01,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 50 states have internal predecessors, (89), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:45:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:45:01,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:01,490 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:01,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:01,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:01,703 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 185402158, now seen corresponding path program 53 times [2022-04-06 09:45:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114119728] [2022-04-06 09:45:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:45:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:45:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:45:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:45:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:45:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:45:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:45:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:45:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:45:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:45:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:45:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:01,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114119728] [2022-04-06 09:45:01,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114119728] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594782222] [2022-04-06 09:45:01,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:45:01,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:01,997 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:01,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 09:45:02,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-04-06 09:45:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:45:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:02,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:02,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594782222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:02,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:02,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 50 [2022-04-06 09:45:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536793872] [2022-04-06 09:45:02,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:02,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 09:45:02,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 09:45:02,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=2023, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 09:45:02,651 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 50 states, 50 states have (on average 1.76) internal successors, (88), 49 states have internal predecessors, (88), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:05,017 INFO L93 Difference]: Finished difference Result 570 states and 712 transitions. [2022-04-06 09:45:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 09:45:05,017 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 49 states have internal predecessors, (88), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:45:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:05,019 INFO L225 Difference]: With dead ends: 570 [2022-04-06 09:45:05,019 INFO L226 Difference]: Without dead ends: 526 [2022-04-06 09:45:05,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4793 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2370, Invalid=11202, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 09:45:05,020 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 217 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:05,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 97 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:45:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-04-06 09:45:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 131. [2022-04-06 09:45:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:45:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:45:05,182 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:45:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:05,182 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:45:05,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 49 states have internal predecessors, (88), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:45:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:45:05,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:05,183 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:05,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:05,398 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:05,398 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash -473340242, now seen corresponding path program 54 times [2022-04-06 09:45:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5561092] [2022-04-06 09:45:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:45:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:45:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:45:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:45:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:45:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:45:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:45:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:45:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:45:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:45:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:45:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:05,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:05,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5561092] [2022-04-06 09:45:05,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5561092] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:05,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526984946] [2022-04-06 09:45:05,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:45:05,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:05,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:05,662 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:05,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 09:45:05,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 09:45:05,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:05,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:45:05,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:06,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:06,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526984946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:06,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:06,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 49 [2022-04-06 09:45:06,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027526833] [2022-04-06 09:45:06,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:06,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 09:45:06,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 09:45:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1930, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 09:45:06,479 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:08,882 INFO L93 Difference]: Finished difference Result 609 states and 764 transitions. [2022-04-06 09:45:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 09:45:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:45:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:08,884 INFO L225 Difference]: With dead ends: 609 [2022-04-06 09:45:08,884 INFO L226 Difference]: Without dead ends: 565 [2022-04-06 09:45:08,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4356 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2177, Invalid=10255, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 09:45:08,885 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 251 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:08,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 99 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:45:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-04-06 09:45:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 131. [2022-04-06 09:45:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:45:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:45:09,045 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:45:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:09,045 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:45:09,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:45:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:45:09,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:09,045 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:09,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:09,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:09,261 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1741515986, now seen corresponding path program 55 times [2022-04-06 09:45:09,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:09,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103274549] [2022-04-06 09:45:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:09,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:45:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:45:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:45:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:45:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:45:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:45:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:45:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:45:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:45:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:45:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:45:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:09,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103274549] [2022-04-06 09:45:09,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103274549] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:09,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89437225] [2022-04-06 09:45:09,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:45:09,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:09,521 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:09,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 09:45:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:45:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:10,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:10,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89437225] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:10,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:10,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 48 [2022-04-06 09:45:10,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073952240] [2022-04-06 09:45:10,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:10,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 09:45:10,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:10,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 09:45:10,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 09:45:10,335 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:12,652 INFO L93 Difference]: Finished difference Result 647 states and 815 transitions. [2022-04-06 09:45:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 09:45:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:45:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:12,655 INFO L225 Difference]: With dead ends: 647 [2022-04-06 09:45:12,655 INFO L226 Difference]: Without dead ends: 603 [2022-04-06 09:45:12,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1927, Invalid=8993, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 09:45:12,656 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 298 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:12,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 68 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-04-06 09:45:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 131. [2022-04-06 09:45:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 104 states have internal predecessors, (117), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:45:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-04-06 09:45:12,827 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 105 [2022-04-06 09:45:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:12,828 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-04-06 09:45:12,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-04-06 09:45:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 09:45:12,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:12,828 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:12,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 09:45:13,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:13,044 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1404163758, now seen corresponding path program 11 times [2022-04-06 09:45:13,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:13,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89940421] [2022-04-06 09:45:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 09:45:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 09:45:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 09:45:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 09:45:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 09:45:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 09:45:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 09:45:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 09:45:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 09:45:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 09:45:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 09:45:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89940421] [2022-04-06 09:45:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89940421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883471888] [2022-04-06 09:45:13,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:45:13,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:13,263 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:13,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 09:45:13,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-04-06 09:45:13,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:45:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:13,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:13,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883471888] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:13,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:13,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 47 [2022-04-06 09:45:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025204540] [2022-04-06 09:45:13,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:13,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 09:45:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 09:45:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 09:45:13,947 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:16,308 INFO L93 Difference]: Finished difference Result 687 states and 869 transitions. [2022-04-06 09:45:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 09:45:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 105 [2022-04-06 09:45:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:16,310 INFO L225 Difference]: With dead ends: 687 [2022-04-06 09:45:16,310 INFO L226 Difference]: Without dead ends: 643 [2022-04-06 09:45:16,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1654, Invalid=7466, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 09:45:16,311 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 390 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:16,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 89 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-04-06 09:45:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 133. [2022-04-06 09:45:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 106 states have internal predecessors, (120), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:45:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-04-06 09:45:16,483 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 105 [2022-04-06 09:45:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:16,483 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-04-06 09:45:16,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8085106382978724) internal successors, (85), 46 states have internal predecessors, (85), 25 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 09:45:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-04-06 09:45:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 09:45:16,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:16,484 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:16,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:16,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 09:45:16,700 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:16,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:16,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1685503246, now seen corresponding path program 22 times [2022-04-06 09:45:16,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:16,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116147979] [2022-04-06 09:45:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:16,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 88 proven. 199 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:16,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116147979] [2022-04-06 09:45:16,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116147979] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332607485] [2022-04-06 09:45:16,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:45:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:16,836 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:16,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 09:45:16,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:45:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 09:45:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:17,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 09:45:17,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332607485] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:17,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:17,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 21 [2022-04-06 09:45:17,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959150654] [2022-04-06 09:45:17,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:17,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 09:45:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 09:45:17,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-04-06 09:45:17,189 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:45:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:17,674 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-04-06 09:45:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 09:45:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 106 [2022-04-06 09:45:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:17,675 INFO L225 Difference]: With dead ends: 146 [2022-04-06 09:45:17,675 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 09:45:17,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 09:45:17,675 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:17,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 78 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:45:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 09:45:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-04-06 09:45:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2022-04-06 09:45:17,845 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 106 [2022-04-06 09:45:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:17,846 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2022-04-06 09:45:17,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 09:45:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2022-04-06 09:45:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:17,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:17,846 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:17,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:18,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:18,059 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1948361994, now seen corresponding path program 23 times [2022-04-06 09:45:18,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:18,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999916814] [2022-04-06 09:45:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:18,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:18,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999916814] [2022-04-06 09:45:18,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999916814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100281205] [2022-04-06 09:45:18,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:45:18,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:18,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:18,367 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:18,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 09:45:18,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-04-06 09:45:18,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:19,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:19,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100281205] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:19,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:19,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 09:45:19,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094380485] [2022-04-06 09:45:19,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:19,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 09:45:19,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 09:45:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=3083, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 09:45:19,433 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:20,508 INFO L93 Difference]: Finished difference Result 239 states and 280 transitions. [2022-04-06 09:45:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 09:45:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:20,509 INFO L225 Difference]: With dead ends: 239 [2022-04-06 09:45:20,509 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 09:45:20,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1520, Invalid=6670, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 09:45:20,510 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:20,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 105 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 09:45:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2022-04-06 09:45:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:20,697 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:20,697 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:20,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:20,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:20,697 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:20,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:20,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:20,913 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1520896138, now seen corresponding path program 56 times [2022-04-06 09:45:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:20,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532332161] [2022-04-06 09:45:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:21,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532332161] [2022-04-06 09:45:21,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532332161] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050042592] [2022-04-06 09:45:21,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:45:21,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:21,221 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:21,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 09:45:21,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:45:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:22,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:22,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050042592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:22,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:22,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 61 [2022-04-06 09:45:22,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294823912] [2022-04-06 09:45:22,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:22,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 09:45:22,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:22,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 09:45:22,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=3001, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 09:45:22,156 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:23,636 INFO L93 Difference]: Finished difference Result 290 states and 345 transitions. [2022-04-06 09:45:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 09:45:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:23,637 INFO L225 Difference]: With dead ends: 290 [2022-04-06 09:45:23,637 INFO L226 Difference]: Without dead ends: 243 [2022-04-06 09:45:23,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1856, Invalid=8650, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 09:45:23,638 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 76 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:23,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 109 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-06 09:45:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 141. [2022-04-06 09:45:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:23,841 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:23,841 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:23,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:23,842 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:23,842 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:23,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 09:45:24,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:24,058 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1540934390, now seen corresponding path program 57 times [2022-04-06 09:45:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:24,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663455528] [2022-04-06 09:45:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:24,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:24,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663455528] [2022-04-06 09:45:24,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663455528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:24,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608614334] [2022-04-06 09:45:24,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:45:24,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:24,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:24,359 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:24,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 09:45:24,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-04-06 09:45:24,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:24,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:25,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608614334] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:25,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:25,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 60 [2022-04-06 09:45:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043550670] [2022-04-06 09:45:25,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:25,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 09:45:25,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:25,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 09:45:25,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2917, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 09:45:25,427 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:27,113 INFO L93 Difference]: Finished difference Result 340 states and 409 transitions. [2022-04-06 09:45:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 09:45:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:27,114 INFO L225 Difference]: With dead ends: 340 [2022-04-06 09:45:27,114 INFO L226 Difference]: Without dead ends: 293 [2022-04-06 09:45:27,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2203, Invalid=10453, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 09:45:27,115 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:27,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 83 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-06 09:45:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 141. [2022-04-06 09:45:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:27,326 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:27,326 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:27,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:27,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:27,327 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:27,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:27,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:27,544 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1269790858, now seen corresponding path program 58 times [2022-04-06 09:45:27,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:27,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620959483] [2022-04-06 09:45:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:27,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:27,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:27,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620959483] [2022-04-06 09:45:27,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620959483] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:27,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572115905] [2022-04-06 09:45:27,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:45:27,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:27,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:27,840 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:27,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 09:45:27,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:45:27,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:27,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:28,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:28,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572115905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:28,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:28,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 59 [2022-04-06 09:45:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801723539] [2022-04-06 09:45:28,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:28,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 09:45:28,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 09:45:28,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2831, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 09:45:28,712 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 states have internal predecessors, (99), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:30,539 INFO L93 Difference]: Finished difference Result 389 states and 472 transitions. [2022-04-06 09:45:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 09:45:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 states have internal predecessors, (99), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:30,540 INFO L225 Difference]: With dead ends: 389 [2022-04-06 09:45:30,540 INFO L226 Difference]: Without dead ends: 342 [2022-04-06 09:45:30,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4979 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2517, Invalid=12003, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 09:45:30,541 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:30,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 99 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:45:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-04-06 09:45:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 141. [2022-04-06 09:45:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:30,755 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:30,755 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:30,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 58 states have internal predecessors, (99), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:30,756 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:30,756 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:30,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:30,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:30,972 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash 944817418, now seen corresponding path program 59 times [2022-04-06 09:45:30,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:30,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637030613] [2022-04-06 09:45:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:30,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:31,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637030613] [2022-04-06 09:45:31,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637030613] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434043254] [2022-04-06 09:45:31,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:45:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:31,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:31,164 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:31,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 09:45:31,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-04-06 09:45:31,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:31,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:31,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434043254] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:31,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:31,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 58 [2022-04-06 09:45:31,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068555014] [2022-04-06 09:45:31,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:31,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 09:45:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 09:45:31,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2743, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 09:45:31,836 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 58 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 57 states have internal predecessors, (98), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:33,921 INFO L93 Difference]: Finished difference Result 437 states and 534 transitions. [2022-04-06 09:45:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 09:45:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 57 states have internal predecessors, (98), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:33,923 INFO L225 Difference]: With dead ends: 437 [2022-04-06 09:45:33,923 INFO L226 Difference]: Without dead ends: 390 [2022-04-06 09:45:33,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2774, Invalid=13228, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 09:45:33,949 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 132 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:33,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 90 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-06 09:45:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 141. [2022-04-06 09:45:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:34,170 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:34,171 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:34,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 57 states have internal predecessors, (98), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:34,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:34,171 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:34,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:34,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-04-06 09:45:34,375 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1005328246, now seen corresponding path program 60 times [2022-04-06 09:45:34,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781368644] [2022-04-06 09:45:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:34,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781368644] [2022-04-06 09:45:34,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781368644] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509787503] [2022-04-06 09:45:34,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:45:34,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:34,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:34,691 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:34,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 09:45:34,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 09:45:34,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:34,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:34,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:35,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:35,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509787503] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:35,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:35,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 57 [2022-04-06 09:45:35,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575732416] [2022-04-06 09:45:35,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:35,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 09:45:35,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 09:45:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 09:45:35,348 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 57 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 56 states have internal predecessors, (97), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:37,767 INFO L93 Difference]: Finished difference Result 484 states and 595 transitions. [2022-04-06 09:45:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 09:45:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 56 states have internal predecessors, (97), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:37,769 INFO L225 Difference]: With dead ends: 484 [2022-04-06 09:45:37,769 INFO L226 Difference]: Without dead ends: 437 [2022-04-06 09:45:37,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2956, Invalid=14074, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 09:45:37,770 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 202 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:37,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 98 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:45:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-04-06 09:45:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 141. [2022-04-06 09:45:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:37,996 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:37,996 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:37,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 56 states have internal predecessors, (97), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:37,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:37,996 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:38,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:38,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 09:45:38,211 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -375499510, now seen corresponding path program 61 times [2022-04-06 09:45:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502672159] [2022-04-06 09:45:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 212 proven. 76 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:38,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:38,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502672159] [2022-04-06 09:45:38,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502672159] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:38,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016488435] [2022-04-06 09:45:38,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:45:38,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:38,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:38,518 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:38,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 09:45:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:39,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:39,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016488435] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:39,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:39,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 56 [2022-04-06 09:45:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378648876] [2022-04-06 09:45:39,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:39,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 09:45:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 09:45:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=2561, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 09:45:39,484 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:42,573 INFO L93 Difference]: Finished difference Result 530 states and 655 transitions. [2022-04-06 09:45:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 09:45:42,573 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:42,575 INFO L225 Difference]: With dead ends: 530 [2022-04-06 09:45:42,575 INFO L226 Difference]: Without dead ends: 483 [2022-04-06 09:45:42,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3051, Invalid=14505, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 09:45:42,576 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 175 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:42,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 108 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:45:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-04-06 09:45:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 141. [2022-04-06 09:45:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:42,803 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:42,803 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:42,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:42,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:42,804 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:42,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 09:45:43,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:43,019 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:43,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash -355182454, now seen corresponding path program 62 times [2022-04-06 09:45:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:43,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506236783] [2022-04-06 09:45:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:43,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:43,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506236783] [2022-04-06 09:45:43,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506236783] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:43,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691343273] [2022-04-06 09:45:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:45:43,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:43,262 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:43,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 09:45:43,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:45:43,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:43,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:43,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:43,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:44,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691343273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:44,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:44,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 55 [2022-04-06 09:45:44,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318599910] [2022-04-06 09:45:44,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:44,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 09:45:44,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 09:45:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2467, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 09:45:44,167 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 55 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 54 states have internal predecessors, (95), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:47,184 INFO L93 Difference]: Finished difference Result 575 states and 714 transitions. [2022-04-06 09:45:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 09:45:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 54 states have internal predecessors, (95), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:47,186 INFO L225 Difference]: With dead ends: 575 [2022-04-06 09:45:47,186 INFO L226 Difference]: Without dead ends: 528 [2022-04-06 09:45:47,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6282 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3053, Invalid=14503, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 09:45:47,188 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:47,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 90 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:45:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-04-06 09:45:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 141. [2022-04-06 09:45:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:47,415 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:47,415 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:47,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 54 states have internal predecessors, (95), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:47,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:47,425 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:47,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:47,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:47,641 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:47,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1324358390, now seen corresponding path program 63 times [2022-04-06 09:45:47,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:47,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440076895] [2022-04-06 09:45:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:48,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440076895] [2022-04-06 09:45:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440076895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507792912] [2022-04-06 09:45:48,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:45:48,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:48,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:48,049 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:48,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 09:45:48,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-04-06 09:45:48,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:48,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:48,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507792912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:48,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:48,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 54 [2022-04-06 09:45:48,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185365470] [2022-04-06 09:45:48,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:48,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 09:45:48,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:48,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 09:45:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=2371, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:45:48,824 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:51,766 INFO L93 Difference]: Finished difference Result 619 states and 772 transitions. [2022-04-06 09:45:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 09:45:51,767 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:51,775 INFO L225 Difference]: With dead ends: 619 [2022-04-06 09:45:51,775 INFO L226 Difference]: Without dead ends: 572 [2022-04-06 09:45:51,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2962, Invalid=14068, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 09:45:51,776 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 226 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:51,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 113 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:45:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-04-06 09:45:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 141. [2022-04-06 09:45:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:52,005 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:52,005 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:52,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 53 states have internal predecessors, (94), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:52,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:52,006 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:52,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:52,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 09:45:52,222 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1494169462, now seen corresponding path program 64 times [2022-04-06 09:45:52,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:52,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536084297] [2022-04-06 09:45:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:52,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:52,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536084297] [2022-04-06 09:45:52,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536084297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:52,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228301026] [2022-04-06 09:45:52,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:45:52,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:52,508 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:52,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 09:45:52,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:45:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:53,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:53,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228301026] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:53,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:53,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 53 [2022-04-06 09:45:53,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335689517] [2022-04-06 09:45:53,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:53,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 09:45:53,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 09:45:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2273, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 09:45:53,419 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:56,661 INFO L93 Difference]: Finished difference Result 662 states and 829 transitions. [2022-04-06 09:45:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 09:45:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:45:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:56,664 INFO L225 Difference]: With dead ends: 662 [2022-04-06 09:45:56,664 INFO L226 Difference]: Without dead ends: 615 [2022-04-06 09:45:56,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2784, Invalid=13218, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 09:45:56,665 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 254 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:56,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 85 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:45:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-04-06 09:45:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 141. [2022-04-06 09:45:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:45:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:45:56,900 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:45:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:56,901 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:45:56,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:45:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:45:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:45:56,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:45:56,901 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:45:56,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:57,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:57,115 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:45:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:45:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash -945457910, now seen corresponding path program 65 times [2022-04-06 09:45:57,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:45:57,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449901676] [2022-04-06 09:45:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:45:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:45:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:45:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:45:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:45:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:45:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:45:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:45:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:45:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:45:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:45:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:45:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:45:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449901676] [2022-04-06 09:45:57,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449901676] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146424094] [2022-04-06 09:45:57,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:45:57,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:57,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:57,417 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:45:57,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 09:45:57,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-04-06 09:45:57,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:45:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:45:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:57,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:45:57,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146424094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:57,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:57,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 52 [2022-04-06 09:45:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976115857] [2022-04-06 09:45:57,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:57,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 09:45:57,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 09:45:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 09:45:57,971 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:46:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:01,198 INFO L93 Difference]: Finished difference Result 704 states and 885 transitions. [2022-04-06 09:46:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 09:46:01,199 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:46:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:01,200 INFO L225 Difference]: With dead ends: 704 [2022-04-06 09:46:01,200 INFO L226 Difference]: Without dead ends: 657 [2022-04-06 09:46:01,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2531, Invalid=11989, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 09:46:01,201 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 294 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:01,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 91 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:46:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-04-06 09:46:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 141. [2022-04-06 09:46:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:46:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:46:01,443 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:46:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:01,443 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:46:01,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 51 states have internal predecessors, (92), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:46:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:46:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:46:01,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:01,444 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:01,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 09:46:01,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:01,654 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1620494198, now seen corresponding path program 66 times [2022-04-06 09:46:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:01,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196023453] [2022-04-06 09:46:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:01,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:46:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:46:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:46:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:46:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:46:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:46:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:46:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:46:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:46:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:46:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:46:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:46:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:01,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:01,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196023453] [2022-04-06 09:46:01,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196023453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:01,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270215626] [2022-04-06 09:46:01,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:46:01,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:01,914 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:01,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 09:46:01,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 09:46:01,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:01,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:46:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:02,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:02,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270215626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:02,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:02,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 51 [2022-04-06 09:46:02,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340441739] [2022-04-06 09:46:02,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:02,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 09:46:02,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 09:46:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 09:46:02,675 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 50 states have internal predecessors, (91), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:46:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:05,767 INFO L93 Difference]: Finished difference Result 745 states and 940 transitions. [2022-04-06 09:46:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 09:46:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 50 states have internal predecessors, (91), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:46:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:05,768 INFO L225 Difference]: With dead ends: 745 [2022-04-06 09:46:05,768 INFO L226 Difference]: Without dead ends: 698 [2022-04-06 09:46:05,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4362 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2221, Invalid=10435, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 09:46:05,769 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 374 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:05,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 79 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:46:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-04-06 09:46:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 141. [2022-04-06 09:46:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 111 states have (on average 1.135135135135135) internal successors, (126), 112 states have internal predecessors, (126), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:46:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2022-04-06 09:46:05,999 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 113 [2022-04-06 09:46:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:06,000 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2022-04-06 09:46:06,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 50 states have internal predecessors, (91), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:46:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2022-04-06 09:46:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 09:46:06,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:06,000 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:06,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 09:46:06,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 09:46:06,216 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1503722230, now seen corresponding path program 12 times [2022-04-06 09:46:06,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:06,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126148034] [2022-04-06 09:46:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:06,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 09:46:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:46:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 09:46:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 09:46:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:46:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 09:46:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 09:46:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 09:46:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 09:46:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 09:46:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 09:46:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 09:46:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:06,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126148034] [2022-04-06 09:46:06,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126148034] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:06,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301436614] [2022-04-06 09:46:06,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:46:06,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:06,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:06,477 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:06,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 09:46:06,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 09:46:06,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 09:46:06,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:07,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:07,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301436614] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:07,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:07,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 50 [2022-04-06 09:46:07,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051158907] [2022-04-06 09:46:07,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:07,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 09:46:07,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:07,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 09:46:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1967, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 09:46:07,341 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:46:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:10,309 INFO L93 Difference]: Finished difference Result 788 states and 998 transitions. [2022-04-06 09:46:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 09:46:10,309 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 113 [2022-04-06 09:46:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:10,311 INFO L225 Difference]: With dead ends: 788 [2022-04-06 09:46:10,311 INFO L226 Difference]: Without dead ends: 741 [2022-04-06 09:46:10,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1892, Invalid=8614, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 09:46:10,312 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 386 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:10,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 94 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:46:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-04-06 09:46:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 143. [2022-04-06 09:46:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 113 states have (on average 1.1415929203539823) internal successors, (129), 114 states have internal predecessors, (129), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:46:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2022-04-06 09:46:10,601 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 113 [2022-04-06 09:46:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:10,601 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2022-04-06 09:46:10,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 09:46:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2022-04-06 09:46:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 09:46:10,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:10,604 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:10,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:10,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 09:46:10,820 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1047413014, now seen corresponding path program 24 times [2022-04-06 09:46:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:10,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906532026] [2022-04-06 09:46:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 102 proven. 235 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:10,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:10,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906532026] [2022-04-06 09:46:10,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906532026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:10,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240565994] [2022-04-06 09:46:10,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:46:10,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:10,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:10,970 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:10,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 09:46:11,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 09:46:11,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 09:46:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:11,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 09:46:11,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240565994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:11,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:11,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 22 [2022-04-06 09:46:11,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223457429] [2022-04-06 09:46:11,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:11,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 09:46:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 09:46:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2022-04-06 09:46:11,391 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:46:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:11,966 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-04-06 09:46:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 09:46:11,967 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 114 [2022-04-06 09:46:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:11,967 INFO L225 Difference]: With dead ends: 156 [2022-04-06 09:46:11,967 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 09:46:11,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 09:46:11,967 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 85 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:11,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 85 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:46:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 09:46:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2022-04-06 09:46:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2022-04-06 09:46:12,201 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 114 [2022-04-06 09:46:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:12,201 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2022-04-06 09:46:12,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:46:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2022-04-06 09:46:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:12,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:12,201 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:12,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:12,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:12,403 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1498813358, now seen corresponding path program 25 times [2022-04-06 09:46:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:12,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377445242] [2022-04-06 09:46:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:12,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377445242] [2022-04-06 09:46:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377445242] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191057099] [2022-04-06 09:46:12,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:46:12,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:12,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:12,696 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:12,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 09:46:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:12,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:12,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:13,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:13,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191057099] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:13,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:13,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 09:46:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338926662] [2022-04-06 09:46:13,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:13,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 09:46:13,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:13,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 09:46:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=3497, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 09:46:13,841 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 65 states have internal predecessors, (108), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:15,108 INFO L93 Difference]: Finished difference Result 256 states and 300 transitions. [2022-04-06 09:46:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 09:46:15,108 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 65 states have internal predecessors, (108), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:15,109 INFO L225 Difference]: With dead ends: 256 [2022-04-06 09:46:15,109 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 09:46:15,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1717, Invalid=7595, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 09:46:15,110 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:15,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 95 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:46:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 09:46:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2022-04-06 09:46:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:15,395 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:15,395 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:15,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 65 states have internal predecessors, (108), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:15,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:15,396 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:15,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 09:46:15,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:15,612 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2080377042, now seen corresponding path program 67 times [2022-04-06 09:46:15,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:15,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547544682] [2022-04-06 09:46:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:15,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:15,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:15,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547544682] [2022-04-06 09:46:15,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547544682] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:15,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211896711] [2022-04-06 09:46:15,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:46:15,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:15,953 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:15,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 09:46:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:16,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:16,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:17,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211896711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:17,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:17,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 65 [2022-04-06 09:46:17,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952805491] [2022-04-06 09:46:17,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:17,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 09:46:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 09:46:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=3410, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 09:46:17,109 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:18,582 INFO L93 Difference]: Finished difference Result 311 states and 370 transitions. [2022-04-06 09:46:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 09:46:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:18,583 INFO L225 Difference]: With dead ends: 311 [2022-04-06 09:46:18,583 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 09:46:18,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4009 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2107, Invalid=9883, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 09:46:18,584 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:18,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 89 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:46:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 09:46:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 151. [2022-04-06 09:46:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:18,865 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:18,865 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:18,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:18,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:18,866 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:18,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:19,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-04-06 09:46:19,082 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash 852206510, now seen corresponding path program 68 times [2022-04-06 09:46:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:19,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788432147] [2022-04-06 09:46:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:19,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788432147] [2022-04-06 09:46:19,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788432147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947773355] [2022-04-06 09:46:19,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:46:19,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:19,312 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:19,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 09:46:19,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:46:19,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:19,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:19,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:19,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:20,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947773355] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:20,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:20,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 64 [2022-04-06 09:46:20,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154870158] [2022-04-06 09:46:20,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:20,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 09:46:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 09:46:20,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 09:46:20,004 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 64 states, 64 states have (on average 1.65625) internal successors, (106), 63 states have internal predecessors, (106), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:21,968 INFO L93 Difference]: Finished difference Result 365 states and 439 transitions. [2022-04-06 09:46:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 09:46:21,969 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.65625) internal successors, (106), 63 states have internal predecessors, (106), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:21,970 INFO L225 Difference]: With dead ends: 365 [2022-04-06 09:46:21,970 INFO L226 Difference]: Without dead ends: 315 [2022-04-06 09:46:21,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4946 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2516, Invalid=12004, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 09:46:21,981 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 100 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:21,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 90 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:46:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-04-06 09:46:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 151. [2022-04-06 09:46:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:22,282 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:22,283 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:22,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.65625) internal successors, (106), 63 states have internal predecessors, (106), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:22,283 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:22,283 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:22,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:22,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 09:46:22,498 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:22,498 INFO L85 PathProgramCache]: Analyzing trace with hash -577214674, now seen corresponding path program 69 times [2022-04-06 09:46:22,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:22,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375608267] [2022-04-06 09:46:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:22,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375608267] [2022-04-06 09:46:22,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375608267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896288659] [2022-04-06 09:46:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:46:22,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:22,843 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:22,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 09:46:22,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-04-06 09:46:22,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:22,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:23,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:23,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896288659] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:23,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:23,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 63 [2022-04-06 09:46:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109970498] [2022-04-06 09:46:23,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:23,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 09:46:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 09:46:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=3230, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 09:46:23,928 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:26,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:26,544 INFO L93 Difference]: Finished difference Result 418 states and 507 transitions. [2022-04-06 09:46:26,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 09:46:26,544 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:26,545 INFO L225 Difference]: With dead ends: 418 [2022-04-06 09:46:26,545 INFO L226 Difference]: Without dead ends: 368 [2022-04-06 09:46:26,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5803 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2896, Invalid=13874, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 09:46:26,546 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 109 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:26,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 89 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:46:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-04-06 09:46:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 151. [2022-04-06 09:46:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:26,832 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:26,832 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:26,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:26,833 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:26,833 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:26,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 09:46:27,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:27,049 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash 207958958, now seen corresponding path program 70 times [2022-04-06 09:46:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:27,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310416165] [2022-04-06 09:46:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:27,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:27,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310416165] [2022-04-06 09:46:27,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310416165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:27,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828699801] [2022-04-06 09:46:27,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:46:27,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:27,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:27,372 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:27,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 09:46:27,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:46:27,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:27,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:28,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:28,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828699801] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:28,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:28,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 62 [2022-04-06 09:46:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842733234] [2022-04-06 09:46:28,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:28,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 09:46:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 09:46:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=3137, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 09:46:28,459 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:31,407 INFO L93 Difference]: Finished difference Result 470 states and 574 transitions. [2022-04-06 09:46:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 09:46:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:31,408 INFO L225 Difference]: With dead ends: 470 [2022-04-06 09:46:31,408 INFO L226 Difference]: Without dead ends: 420 [2022-04-06 09:46:31,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6540 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3220, Invalid=15412, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 09:46:31,409 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 131 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:31,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 100 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:46:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-04-06 09:46:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 151. [2022-04-06 09:46:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:31,711 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:31,711 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:31,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 61 states have internal predecessors, (104), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:31,711 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:31,711 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:31,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:31,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:31,927 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1567828178, now seen corresponding path program 71 times [2022-04-06 09:46:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:31,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465526226] [2022-04-06 09:46:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:31,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465526226] [2022-04-06 09:46:32,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465526226] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19908639] [2022-04-06 09:46:32,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:46:32,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:32,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:32,199 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:32,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 09:46:32,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-04-06 09:46:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:33,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:33,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19908639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:33,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:33,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 61 [2022-04-06 09:46:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451461538] [2022-04-06 09:46:33,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:33,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 09:46:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 09:46:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3042, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 09:46:33,239 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:36,465 INFO L93 Difference]: Finished difference Result 521 states and 640 transitions. [2022-04-06 09:46:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 09:46:36,466 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:36,492 INFO L225 Difference]: With dead ends: 521 [2022-04-06 09:46:36,492 INFO L226 Difference]: Without dead ends: 471 [2022-04-06 09:46:36,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3467, Invalid=16555, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 09:46:36,493 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:36,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 91 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:46:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-04-06 09:46:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 151. [2022-04-06 09:46:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:36,917 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:36,917 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:36,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:36,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:36,918 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:36,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:37,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-04-06 09:46:37,131 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1625111634, now seen corresponding path program 72 times [2022-04-06 09:46:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:37,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354868946] [2022-04-06 09:46:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:37,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:37,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354868946] [2022-04-06 09:46:37,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354868946] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914479288] [2022-04-06 09:46:37,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:46:37,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:37,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:37,459 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:37,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 09:46:37,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-04-06 09:46:37,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:37,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:38,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:38,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914479288] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:38,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:38,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 60 [2022-04-06 09:46:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44037838] [2022-04-06 09:46:38,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:38,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 09:46:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 09:46:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=2945, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 09:46:38,505 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 60 states, 60 states have (on average 1.7) internal successors, (102), 59 states have internal predecessors, (102), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:41,666 INFO L93 Difference]: Finished difference Result 571 states and 705 transitions. [2022-04-06 09:46:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 09:46:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7) internal successors, (102), 59 states have internal predecessors, (102), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:41,667 INFO L225 Difference]: With dead ends: 571 [2022-04-06 09:46:41,667 INFO L226 Difference]: Without dead ends: 521 [2022-04-06 09:46:41,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3622, Invalid=17258, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 09:46:41,669 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 188 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:41,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 100 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:46:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-04-06 09:46:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 151. [2022-04-06 09:46:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:41,977 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:41,977 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:41,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7) internal successors, (102), 59 states have internal predecessors, (102), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:41,979 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:41,979 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:41,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:42,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 09:46:42,195 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -102938834, now seen corresponding path program 73 times [2022-04-06 09:46:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933023311] [2022-04-06 09:46:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:42,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933023311] [2022-04-06 09:46:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933023311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130683732] [2022-04-06 09:46:42,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:46:42,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:42,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:42,557 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:42,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 09:46:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:42,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:42,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:43,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:43,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130683732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:43,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:43,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 59 [2022-04-06 09:46:43,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894192394] [2022-04-06 09:46:43,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:43,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 09:46:43,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 09:46:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 09:46:43,457 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 states have internal predecessors, (101), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:46,889 INFO L93 Difference]: Finished difference Result 620 states and 769 transitions. [2022-04-06 09:46:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 09:46:46,889 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 states have internal predecessors, (101), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:46,890 INFO L225 Difference]: With dead ends: 620 [2022-04-06 09:46:46,891 INFO L226 Difference]: Without dead ends: 570 [2022-04-06 09:46:46,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7661 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3676, Invalid=17494, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 09:46:46,892 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 196 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:46,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 108 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:46:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-04-06 09:46:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 151. [2022-04-06 09:46:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:47,191 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:47,191 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:47,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 states have internal predecessors, (101), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:47,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:47,192 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:47,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:47,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-04-06 09:46:47,407 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -469478482, now seen corresponding path program 74 times [2022-04-06 09:46:47,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:47,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44732660] [2022-04-06 09:46:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:47,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44732660] [2022-04-06 09:46:47,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44732660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168874694] [2022-04-06 09:46:47,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:46:47,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:47,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:47,715 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:47,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 09:46:47,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:46:47,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:47,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:48,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:48,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168874694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:48,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:48,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 58 [2022-04-06 09:46:48,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132896184] [2022-04-06 09:46:48,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:48,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 09:46:48,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 09:46:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 09:46:48,720 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 58 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 57 states have internal predecessors, (100), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:52,610 INFO L93 Difference]: Finished difference Result 668 states and 832 transitions. [2022-04-06 09:46:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 09:46:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 57 states have internal predecessors, (100), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:52,612 INFO L225 Difference]: With dead ends: 668 [2022-04-06 09:46:52,612 INFO L226 Difference]: Without dead ends: 618 [2022-04-06 09:46:52,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7603 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3626, Invalid=17254, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 09:46:52,613 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 280 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:52,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 92 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:46:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-06 09:46:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 151. [2022-04-06 09:46:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:52,934 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:52,934 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:52,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 57 states have internal predecessors, (100), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:52,935 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:52,935 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:52,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-06 09:46:53,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 09:46:53,142 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash -896944338, now seen corresponding path program 75 times [2022-04-06 09:46:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:53,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396220813] [2022-04-06 09:46:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:53,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:53,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:53,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396220813] [2022-04-06 09:46:53,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396220813] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:53,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902302759] [2022-04-06 09:46:53,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:46:53,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:53,484 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:53,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 09:46:53,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-04-06 09:46:53,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:46:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:54,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:46:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:54,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902302759] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:46:54,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:46:54,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 57 [2022-04-06 09:46:54,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104760797] [2022-04-06 09:46:54,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:46:54,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 09:46:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:46:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 09:46:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2642, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 09:46:54,482 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:46:58,574 INFO L93 Difference]: Finished difference Result 715 states and 894 transitions. [2022-04-06 09:46:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 09:46:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:46:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:46:58,576 INFO L225 Difference]: With dead ends: 715 [2022-04-06 09:46:58,576 INFO L226 Difference]: Without dead ends: 665 [2022-04-06 09:46:58,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7310 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3475, Invalid=16547, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 09:46:58,577 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 232 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:46:58,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 97 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:46:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-04-06 09:46:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 151. [2022-04-06 09:46:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:46:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:46:58,896 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:46:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:46:58,896 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:46:58,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.736842105263158) internal successors, (99), 56 states have internal predecessors, (99), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:46:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:46:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:46:58,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:46:58,896 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:46:58,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 09:46:59,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:59,105 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:46:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:46:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash 336192430, now seen corresponding path program 76 times [2022-04-06 09:46:59,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:46:59,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147466018] [2022-04-06 09:46:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:46:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:46:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:46:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:46:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:46:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:46:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:46:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:46:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:46:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:46:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:46:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:46:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:46:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:46:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:46:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:46:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:46:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:46:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:46:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147466018] [2022-04-06 09:46:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147466018] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:46:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674146502] [2022-04-06 09:46:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:46:59,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:46:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:46:59,387 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:46:59,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 09:46:59,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:46:59,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:46:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:46:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:00,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674146502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:00,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:00,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 56 [2022-04-06 09:47:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090676925] [2022-04-06 09:47:00,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:00,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 09:47:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 09:47:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=2537, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 09:47:00,274 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 56 states, 56 states have (on average 1.75) internal successors, (98), 55 states have internal predecessors, (98), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:04,442 INFO L93 Difference]: Finished difference Result 761 states and 955 transitions. [2022-04-06 09:47:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 09:47:04,442 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.75) internal successors, (98), 55 states have internal predecessors, (98), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:47:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:04,443 INFO L225 Difference]: With dead ends: 761 [2022-04-06 09:47:04,443 INFO L226 Difference]: Without dead ends: 711 [2022-04-06 09:47:04,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6783 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3232, Invalid=15400, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 09:47:04,445 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:04,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 99 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:47:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-04-06 09:47:04,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 151. [2022-04-06 09:47:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:47:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:47:04,754 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:47:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:04,754 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:47:04,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.75) internal successors, (98), 55 states have internal predecessors, (98), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:47:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:47:04,754 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:04,755 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:04,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 09:47:04,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:04,967 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1148049618, now seen corresponding path program 77 times [2022-04-06 09:47:04,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:04,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40803377] [2022-04-06 09:47:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:04,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:47:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:47:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:47:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:47:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:47:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:47:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:47:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:47:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:47:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:47:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:47:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:47:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:47:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:05,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:05,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40803377] [2022-04-06 09:47:05,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40803377] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:05,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846336062] [2022-04-06 09:47:05,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:47:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:05,298 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 09:47:05,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-04-06 09:47:05,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:05,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:47:05,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:06,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:06,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846336062] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:06,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:06,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 55 [2022-04-06 09:47:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164378759] [2022-04-06 09:47:06,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:06,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 09:47:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 09:47:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 09:47:06,209 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:10,462 INFO L93 Difference]: Finished difference Result 806 states and 1015 transitions. [2022-04-06 09:47:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 09:47:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:47:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:10,467 INFO L225 Difference]: With dead ends: 806 [2022-04-06 09:47:10,467 INFO L226 Difference]: Without dead ends: 756 [2022-04-06 09:47:10,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2912, Invalid=13858, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 09:47:10,468 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 338 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:10,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 91 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:47:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-04-06 09:47:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 151. [2022-04-06 09:47:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:47:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:47:10,804 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:47:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:10,804 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:47:10,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:47:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:47:10,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:10,804 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:10,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 09:47:11,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-04-06 09:47:11,018 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:11,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1473023058, now seen corresponding path program 78 times [2022-04-06 09:47:11,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:11,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840264694] [2022-04-06 09:47:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:11,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:47:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:47:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:47:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:47:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:47:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:47:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:47:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:47:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:47:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:47:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:47:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:47:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:47:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:11,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840264694] [2022-04-06 09:47:11,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840264694] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874194347] [2022-04-06 09:47:11,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:47:11,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:11,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:11,405 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:11,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 09:47:11,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-04-06 09:47:11,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:47:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:12,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:12,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874194347] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:12,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:12,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 54 [2022-04-06 09:47:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142995853] [2022-04-06 09:47:12,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:12,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 09:47:12,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 09:47:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2321, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:47:12,169 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 54 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 53 states have internal predecessors, (96), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:16,044 INFO L93 Difference]: Finished difference Result 850 states and 1074 transitions. [2022-04-06 09:47:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 09:47:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 53 states have internal predecessors, (96), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:47:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:16,045 INFO L225 Difference]: With dead ends: 850 [2022-04-06 09:47:16,046 INFO L226 Difference]: Without dead ends: 800 [2022-04-06 09:47:16,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5061 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2536, Invalid=11984, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 09:47:16,046 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:16,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 96 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:47:16,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-04-06 09:47:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 151. [2022-04-06 09:47:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:47:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-04-06 09:47:16,369 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 121 [2022-04-06 09:47:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:16,369 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-04-06 09:47:16,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 53 states have internal predecessors, (96), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-04-06 09:47:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 09:47:16,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:16,370 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:16,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 09:47:16,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:16,577 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash 871798574, now seen corresponding path program 13 times [2022-04-06 09:47:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939220729] [2022-04-06 09:47:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:16,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 09:47:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 09:47:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 09:47:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 09:47:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 09:47:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 09:47:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 09:47:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 09:47:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 09:47:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 09:47:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 09:47:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 09:47:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 09:47:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:16,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939220729] [2022-04-06 09:47:16,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939220729] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327694031] [2022-04-06 09:47:16,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:47:16,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:16,907 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:16,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 09:47:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:16,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 09:47:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:17,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:17,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327694031] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:17,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:17,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 53 [2022-04-06 09:47:17,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909247387] [2022-04-06 09:47:17,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:17,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 09:47:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 09:47:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=2210, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 09:47:17,789 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:22,069 INFO L93 Difference]: Finished difference Result 896 states and 1136 transitions. [2022-04-06 09:47:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 09:47:22,070 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 121 [2022-04-06 09:47:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:22,072 INFO L225 Difference]: With dead ends: 896 [2022-04-06 09:47:22,072 INFO L226 Difference]: Without dead ends: 846 [2022-04-06 09:47:22,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2146, Invalid=9844, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 09:47:22,073 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 392 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:22,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 96 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:47:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-04-06 09:47:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 153. [2022-04-06 09:47:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 121 states have (on average 1.140495867768595) internal successors, (138), 122 states have internal predecessors, (138), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:47:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 169 transitions. [2022-04-06 09:47:22,405 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 169 transitions. Word has length 121 [2022-04-06 09:47:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:22,405 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 169 transitions. [2022-04-06 09:47:22,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 29 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 09:47:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 169 transitions. [2022-04-06 09:47:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 09:47:22,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:22,406 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:22,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-04-06 09:47:22,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:22,611 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:22,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1585558130, now seen corresponding path program 26 times [2022-04-06 09:47:22,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:22,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217959319] [2022-04-06 09:47:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:22,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 117 proven. 274 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:22,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217959319] [2022-04-06 09:47:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217959319] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799957722] [2022-04-06 09:47:22,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:47:22,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:22,806 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:22,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 09:47:22,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:47:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 09:47:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:23,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 09:47:23,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799957722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:23,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:23,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 23 [2022-04-06 09:47:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846476628] [2022-04-06 09:47:23,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:23,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 09:47:23,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 09:47:23,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-04-06 09:47:23,275 INFO L87 Difference]: Start difference. First operand 153 states and 169 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 20 states have internal predecessors, (65), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:47:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:23,999 INFO L93 Difference]: Finished difference Result 166 states and 183 transitions. [2022-04-06 09:47:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 09:47:23,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 20 states have internal predecessors, (65), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 122 [2022-04-06 09:47:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:24,001 INFO L225 Difference]: With dead ends: 166 [2022-04-06 09:47:24,001 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 09:47:24,001 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 281 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 09:47:24,001 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 89 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:24,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 82 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:47:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 09:47:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-04-06 09:47:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2022-04-06 09:47:24,332 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 122 [2022-04-06 09:47:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:24,332 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2022-04-06 09:47:24,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 20 states have internal predecessors, (65), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 09:47:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2022-04-06 09:47:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:24,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:24,333 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:24,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-04-06 09:47:24,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-04-06 09:47:24,548 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1796113546, now seen corresponding path program 27 times [2022-04-06 09:47:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:24,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208408235] [2022-04-06 09:47:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:47:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:24,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:24,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208408235] [2022-04-06 09:47:24,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208408235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:24,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401327845] [2022-04-06 09:47:24,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:47:24,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:24,926 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:24,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 09:47:24,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-04-06 09:47:24,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:47:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:25,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:26,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401327845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:26,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:26,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 09:47:26,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272681027] [2022-04-06 09:47:26,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:26,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 09:47:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 09:47:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3937, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 09:47:26,170 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 70 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:27,666 INFO L93 Difference]: Finished difference Result 273 states and 320 transitions. [2022-04-06 09:47:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 09:47:27,667 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:47:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:27,667 INFO L225 Difference]: With dead ends: 273 [2022-04-06 09:47:27,667 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 09:47:27,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1926, Invalid=8580, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 09:47:27,668 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:27,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 96 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:47:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 09:47:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 161. [2022-04-06 09:47:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:47:28,019 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:47:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:28,019 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:47:28,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:47:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:28,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:28,019 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:28,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-04-06 09:47:28,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:28,235 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1386420214, now seen corresponding path program 79 times [2022-04-06 09:47:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:28,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647983846] [2022-04-06 09:47:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:28,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:47:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:28,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:28,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647983846] [2022-04-06 09:47:28,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647983846] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:28,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452717333] [2022-04-06 09:47:28,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:47:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:28,620 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:28,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 09:47:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:47:28,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:29,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:29,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452717333] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:29,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:29,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 69 [2022-04-06 09:47:29,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784228593] [2022-04-06 09:47:29,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:29,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 09:47:29,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:29,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 09:47:29,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=3845, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 09:47:29,857 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 69 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 68 states have internal predecessors, (113), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:31,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:31,795 INFO L93 Difference]: Finished difference Result 332 states and 395 transitions. [2022-04-06 09:47:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 09:47:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 68 states have internal predecessors, (113), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:47:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:31,796 INFO L225 Difference]: With dead ends: 332 [2022-04-06 09:47:31,796 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 09:47:31,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4574 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2374, Invalid=11198, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 09:47:31,797 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 71 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:31,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 101 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:47:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 09:47:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 161. [2022-04-06 09:47:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:47:32,176 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:47:32,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:32,176 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:47:32,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 68 states have internal predecessors, (113), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:32,176 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:47:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:32,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:32,177 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:32,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-04-06 09:47:32,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:32,386 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2113148042, now seen corresponding path program 80 times [2022-04-06 09:47:32,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:32,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528505446] [2022-04-06 09:47:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:32,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:47:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:32,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528505446] [2022-04-06 09:47:32,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528505446] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072375380] [2022-04-06 09:47:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:47:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:32,710 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:32,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 09:47:32,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:47:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:47:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:33,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:33,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072375380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:33,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:33,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 68 [2022-04-06 09:47:33,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925330155] [2022-04-06 09:47:33,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:33,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 09:47:33,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 09:47:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3751, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 09:47:33,844 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:36,488 INFO L93 Difference]: Finished difference Result 390 states and 469 transitions. [2022-04-06 09:47:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 09:47:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:47:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:36,489 INFO L225 Difference]: With dead ends: 390 [2022-04-06 09:47:36,489 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 09:47:36,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5668 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2850, Invalid=13662, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 09:47:36,490 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:36,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 105 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:47:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 09:47:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 161. [2022-04-06 09:47:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:47:36,878 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:47:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:36,878 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:47:36,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 67 states have internal predecessors, (112), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:47:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:36,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:36,879 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:36,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-04-06 09:47:37,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 09:47:37,091 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -544909302, now seen corresponding path program 81 times [2022-04-06 09:47:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:37,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697778664] [2022-04-06 09:47:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:37,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:47:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:37,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697778664] [2022-04-06 09:47:37,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697778664] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929105169] [2022-04-06 09:47:37,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:47:37,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:37,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:37,390 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:37,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 09:47:37,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-04-06 09:47:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:47:37,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:38,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:38,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929105169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:38,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:38,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 67 [2022-04-06 09:47:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302508070] [2022-04-06 09:47:38,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:38,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 09:47:38,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 09:47:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=3655, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 09:47:38,362 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 67 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 66 states have internal predecessors, (111), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:41,552 INFO L93 Difference]: Finished difference Result 447 states and 542 transitions. [2022-04-06 09:47:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 09:47:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 66 states have internal predecessors, (111), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:47:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:41,553 INFO L225 Difference]: With dead ends: 447 [2022-04-06 09:47:41,553 INFO L226 Difference]: Without dead ends: 394 [2022-04-06 09:47:41,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6690 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3302, Invalid=15880, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 09:47:41,554 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:41,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 81 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:47:41,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-04-06 09:47:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 161. [2022-04-06 09:47:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:47:41,954 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:47:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:41,954 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:47:41,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 66 states have internal predecessors, (111), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:47:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:41,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:41,955 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:41,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 09:47:42,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:42,171 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash 754820234, now seen corresponding path program 82 times [2022-04-06 09:47:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:42,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563919273] [2022-04-06 09:47:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:42,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:47:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:42,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:42,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563919273] [2022-04-06 09:47:42,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563919273] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:42,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858707958] [2022-04-06 09:47:42,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:47:42,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:42,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:42,507 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:42,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 09:47:42,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:47:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:47:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:43,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:43,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858707958] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:43,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:43,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 66 [2022-04-06 09:47:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589520983] [2022-04-06 09:47:43,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:43,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 09:47:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 09:47:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=3557, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 09:47:43,247 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:46,457 INFO L93 Difference]: Finished difference Result 503 states and 614 transitions. [2022-04-06 09:47:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 09:47:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:47:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:46,459 INFO L225 Difference]: With dead ends: 503 [2022-04-06 09:47:46,459 INFO L226 Difference]: Without dead ends: 450 [2022-04-06 09:47:46,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7595 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3700, Invalid=17762, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 09:47:46,460 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 120 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:46,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 96 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:47:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-04-06 09:47:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 161. [2022-04-06 09:47:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:47:46,860 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:47:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:46,860 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:47:46,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:47:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:46,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:46,861 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:46,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-04-06 09:47:47,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-06 09:47:47,077 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1628030986, now seen corresponding path program 83 times [2022-04-06 09:47:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:47,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954976417] [2022-04-06 09:47:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:47:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:47,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:47,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954976417] [2022-04-06 09:47:47,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954976417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:47,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090695167] [2022-04-06 09:47:47,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:47:47,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:47,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:47,321 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:47,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 09:47:47,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-04-06 09:47:47,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:47:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:48,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090695167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:48,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:48,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 65 [2022-04-06 09:47:48,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420070500] [2022-04-06 09:47:48,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:48,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 09:47:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 09:47:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=3457, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 09:47:48,386 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 65 states, 65 states have (on average 1.676923076923077) internal successors, (109), 64 states have internal predecessors, (109), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:52,564 INFO L93 Difference]: Finished difference Result 558 states and 685 transitions. [2022-04-06 09:47:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 09:47:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.676923076923077) internal successors, (109), 64 states have internal predecessors, (109), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:47:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:52,565 INFO L225 Difference]: With dead ends: 558 [2022-04-06 09:47:52,565 INFO L226 Difference]: Without dead ends: 505 [2022-04-06 09:47:52,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4020, Invalid=19236, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 09:47:52,566 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:52,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 119 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:47:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-06 09:47:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 161. [2022-04-06 09:47:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:47:52,970 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:47:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:52,970 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:47:52,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.676923076923077) internal successors, (109), 64 states have internal predecessors, (109), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:47:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:52,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:52,970 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:52,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-04-06 09:47:53,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 09:47:53,183 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash 824915082, now seen corresponding path program 84 times [2022-04-06 09:47:53,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:53,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117190707] [2022-04-06 09:47:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:53,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:47:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:47:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:47:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:47:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:47:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:47:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:47:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:47:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:47:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:47:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:47:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:47:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:47:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:47:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:47:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:47:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:47:53,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117190707] [2022-04-06 09:47:53,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117190707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:47:53,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682888955] [2022-04-06 09:47:53,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:47:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:47:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:47:53,476 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:47:53,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 09:47:53,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 09:47:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:47:53,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:47:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:47:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:54,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:47:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:47:54,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682888955] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:47:54,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:47:54,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 64 [2022-04-06 09:47:54,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313294553] [2022-04-06 09:47:54,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:47:54,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 09:47:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:47:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 09:47:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=3355, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 09:47:54,599 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 64 states, 64 states have (on average 1.6875) internal successors, (108), 63 states have internal predecessors, (108), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:47:59,067 INFO L93 Difference]: Finished difference Result 612 states and 755 transitions. [2022-04-06 09:47:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 09:47:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.6875) internal successors, (108), 63 states have internal predecessors, (108), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:47:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:47:59,069 INFO L225 Difference]: With dead ends: 612 [2022-04-06 09:47:59,069 INFO L226 Difference]: Without dead ends: 559 [2022-04-06 09:47:59,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8870 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4244, Invalid=20248, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 09:47:59,070 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 168 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:47:59,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 96 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:47:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-04-06 09:47:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 161. [2022-04-06 09:47:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:47:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:47:59,480 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:47:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:47:59,480 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:47:59,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.6875) internal successors, (108), 63 states have internal predecessors, (108), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:47:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:47:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:47:59,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:47:59,481 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:47:59,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-04-06 09:47:59,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-04-06 09:47:59,698 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:47:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:47:59,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1491744778, now seen corresponding path program 85 times [2022-04-06 09:47:59,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:47:59,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861635190] [2022-04-06 09:47:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:47:59,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:47:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 289 proven. 96 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:00,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861635190] [2022-04-06 09:48:00,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861635190] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304236501] [2022-04-06 09:48:00,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:48:00,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:00,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:00,058 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:00,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 09:48:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:00,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:00,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:00,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304236501] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:00,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:00,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 63 [2022-04-06 09:48:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42167276] [2022-04-06 09:48:00,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:00,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 09:48:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 09:48:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=3251, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 09:48:00,909 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 63 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 62 states have internal predecessors, (107), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:05,433 INFO L93 Difference]: Finished difference Result 665 states and 824 transitions. [2022-04-06 09:48:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 09:48:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 62 states have internal predecessors, (107), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:05,435 INFO L225 Difference]: With dead ends: 665 [2022-04-06 09:48:05,435 INFO L226 Difference]: Without dead ends: 612 [2022-04-06 09:48:05,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9178 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4360, Invalid=20762, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 09:48:05,437 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 190 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:05,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 122 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:48:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-04-06 09:48:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 161. [2022-04-06 09:48:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:48:05,848 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:48:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:05,848 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:48:05,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 62 states have internal predecessors, (107), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:48:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:48:05,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:05,848 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:05,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 09:48:06,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:06,065 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2088975222, now seen corresponding path program 86 times [2022-04-06 09:48:06,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:06,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202172073] [2022-04-06 09:48:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:06,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:06,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202172073] [2022-04-06 09:48:06,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202172073] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309223909] [2022-04-06 09:48:06,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:48:06,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:06,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:06,400 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:06,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 09:48:06,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:48:06,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:48:06,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:07,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:07,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309223909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:07,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:07,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 62 [2022-04-06 09:48:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66689355] [2022-04-06 09:48:07,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:07,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 09:48:07,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 09:48:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=3145, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 09:48:07,332 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 62 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 61 states have internal predecessors, (106), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:12,379 INFO L93 Difference]: Finished difference Result 717 states and 892 transitions. [2022-04-06 09:48:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 09:48:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 61 states have internal predecessors, (106), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:12,380 INFO L225 Difference]: With dead ends: 717 [2022-04-06 09:48:12,380 INFO L226 Difference]: Without dead ends: 664 [2022-04-06 09:48:12,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9244 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4362, Invalid=20760, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 09:48:12,382 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 262 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:12,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 105 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:48:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-04-06 09:48:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 161. [2022-04-06 09:48:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:48:12,798 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:48:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:12,798 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:48:12,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 61 states have internal predecessors, (106), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:48:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:48:12,798 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:12,798 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:12,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-06 09:48:13,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:13,014 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1373198326, now seen corresponding path program 87 times [2022-04-06 09:48:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505274964] [2022-04-06 09:48:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:13,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:13,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505274964] [2022-04-06 09:48:13,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505274964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:13,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374926496] [2022-04-06 09:48:13,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:48:13,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:13,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:13,306 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:13,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 09:48:13,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-04-06 09:48:13,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:48:13,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:14,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:14,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374926496] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:14,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:14,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 61 [2022-04-06 09:48:14,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84343499] [2022-04-06 09:48:14,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:14,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 09:48:14,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 09:48:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 09:48:14,385 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 60 states have internal predecessors, (105), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:19,675 INFO L93 Difference]: Finished difference Result 768 states and 959 transitions. [2022-04-06 09:48:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 09:48:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 60 states have internal predecessors, (105), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:19,677 INFO L225 Difference]: With dead ends: 768 [2022-04-06 09:48:19,677 INFO L226 Difference]: Without dead ends: 715 [2022-04-06 09:48:19,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9056 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4250, Invalid=20242, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 09:48:19,678 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 327 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:19,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 96 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:48:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-04-06 09:48:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 161. [2022-04-06 09:48:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:48:20,102 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:48:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:20,102 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:48:20,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 60 states have internal predecessors, (105), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:48:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:48:20,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:20,103 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:20,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-04-06 09:48:20,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-06 09:48:20,318 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1559385226, now seen corresponding path program 88 times [2022-04-06 09:48:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:20,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560094509] [2022-04-06 09:48:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:20,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560094509] [2022-04-06 09:48:20,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560094509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:20,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590366068] [2022-04-06 09:48:20,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:48:20,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:20,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:20,670 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:20,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 09:48:20,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:48:20,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:48:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:21,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:21,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590366068] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:21,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:21,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 60 [2022-04-06 09:48:21,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662554519] [2022-04-06 09:48:21,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:21,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 09:48:21,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 09:48:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=2927, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 09:48:21,735 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:27,348 INFO L93 Difference]: Finished difference Result 818 states and 1025 transitions. [2022-04-06 09:48:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 09:48:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:27,350 INFO L225 Difference]: With dead ends: 818 [2022-04-06 09:48:27,350 INFO L226 Difference]: Without dead ends: 765 [2022-04-06 09:48:27,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8609 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4030, Invalid=19226, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 09:48:27,351 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 302 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:27,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 113 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:48:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-04-06 09:48:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 161. [2022-04-06 09:48:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:48:27,766 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:48:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:27,767 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:48:27,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:48:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:48:27,772 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:27,772 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:27,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-04-06 09:48:27,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-04-06 09:48:27,988 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash 129964042, now seen corresponding path program 89 times [2022-04-06 09:48:27,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163074657] [2022-04-06 09:48:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:27,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:28,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:28,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163074657] [2022-04-06 09:48:28,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163074657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:28,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895930830] [2022-04-06 09:48:28,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:48:28,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:28,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:28,309 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:28,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 09:48:28,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-04-06 09:48:28,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:48:28,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:29,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895930830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:29,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:29,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 59 [2022-04-06 09:48:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933343864] [2022-04-06 09:48:29,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:29,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 09:48:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 09:48:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2815, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 09:48:29,330 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:34,829 INFO L93 Difference]: Finished difference Result 867 states and 1090 transitions. [2022-04-06 09:48:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 09:48:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:34,831 INFO L225 Difference]: With dead ends: 867 [2022-04-06 09:48:34,831 INFO L226 Difference]: Without dead ends: 814 [2022-04-06 09:48:34,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7910 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3714, Invalid=17748, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 09:48:34,832 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 293 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:34,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 105 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:48:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-04-06 09:48:35,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 161. [2022-04-06 09:48:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:48:35,258 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:48:35,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:35,258 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:48:35,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:48:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:48:35,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:35,258 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:35,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 09:48:35,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:35,474 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash 915137674, now seen corresponding path program 90 times [2022-04-06 09:48:35,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:35,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686896835] [2022-04-06 09:48:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:35,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:35,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:35,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686896835] [2022-04-06 09:48:35,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686896835] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:35,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484874639] [2022-04-06 09:48:35,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:48:35,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:35,768 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:35,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 09:48:35,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 09:48:35,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:48:35,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:35,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:36,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:36,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484874639] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:36,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:36,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 58 [2022-04-06 09:48:36,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349283392] [2022-04-06 09:48:36,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:36,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 09:48:36,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:36,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 09:48:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 09:48:36,796 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 58 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 57 states have internal predecessors, (102), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:42,417 INFO L93 Difference]: Finished difference Result 915 states and 1154 transitions. [2022-04-06 09:48:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 09:48:42,418 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 57 states have internal predecessors, (102), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:42,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:42,435 INFO L225 Difference]: With dead ends: 915 [2022-04-06 09:48:42,435 INFO L226 Difference]: Without dead ends: 862 [2022-04-06 09:48:42,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6978 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3320, Invalid=15862, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 09:48:42,436 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 376 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:42,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 92 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:48:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-04-06 09:48:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 161. [2022-04-06 09:48:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:48:42,892 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:48:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:42,893 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:48:42,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 57 states have internal predecessors, (102), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:48:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:48:42,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:42,893 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:42,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-04-06 09:48:43,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:43,109 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:43,109 INFO L85 PathProgramCache]: Analyzing trace with hash -860649462, now seen corresponding path program 91 times [2022-04-06 09:48:43,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:43,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112304026] [2022-04-06 09:48:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:43,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:43,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112304026] [2022-04-06 09:48:43,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112304026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:43,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673611759] [2022-04-06 09:48:43,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:48:43,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:43,467 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:43,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 09:48:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:43,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:44,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:44,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673611759] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:44,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:44,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 57 [2022-04-06 09:48:44,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943451495] [2022-04-06 09:48:44,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:44,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 09:48:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 09:48:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2585, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 09:48:44,313 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 states have internal predecessors, (101), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:50,003 INFO L93 Difference]: Finished difference Result 962 states and 1217 transitions. [2022-04-06 09:48:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 09:48:50,004 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 states have internal predecessors, (101), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:50,005 INFO L225 Difference]: With dead ends: 962 [2022-04-06 09:48:50,005 INFO L226 Difference]: Without dead ends: 909 [2022-04-06 09:48:50,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5812 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2872, Invalid=13640, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 09:48:50,006 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 320 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:50,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 123 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:48:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-04-06 09:48:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 161. [2022-04-06 09:48:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2022-04-06 09:48:50,501 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 129 [2022-04-06 09:48:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:50,501 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2022-04-06 09:48:50,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 states have internal predecessors, (101), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2022-04-06 09:48:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 09:48:50,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:50,501 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:50,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-04-06 09:48:50,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-06 09:48:50,717 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash -917932918, now seen corresponding path program 14 times [2022-04-06 09:48:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:50,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79204566] [2022-04-06 09:48:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:48:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 09:48:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 09:48:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:48:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 09:48:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 09:48:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 09:48:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 09:48:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 09:48:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 09:48:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 09:48:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 09:48:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 09:48:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 09:48:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:51,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79204566] [2022-04-06 09:48:51,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79204566] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074736291] [2022-04-06 09:48:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:48:51,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:51,081 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:51,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 09:48:51,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:48:51,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:48:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 09:48:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074736291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:52,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:52,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 56 [2022-04-06 09:48:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011435931] [2022-04-06 09:48:52,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:52,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 09:48:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 09:48:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=2467, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 09:48:52,097 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 56 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 55 states have internal predecessors, (100), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:57,782 INFO L93 Difference]: Finished difference Result 1011 states and 1283 transitions. [2022-04-06 09:48:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 09:48:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 55 states have internal predecessors, (100), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 129 [2022-04-06 09:48:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:57,784 INFO L225 Difference]: With dead ends: 1011 [2022-04-06 09:48:57,784 INFO L226 Difference]: Without dead ends: 958 [2022-04-06 09:48:57,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4510 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2416, Invalid=11156, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 09:48:57,785 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 556 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:57,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 95 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:48:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-04-06 09:48:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 163. [2022-04-06 09:48:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 130 states have internal predecessors, (147), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:48:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 180 transitions. [2022-04-06 09:48:58,234 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 180 transitions. Word has length 129 [2022-04-06 09:48:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:48:58,234 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 180 transitions. [2022-04-06 09:48:58,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 55 states have internal predecessors, (100), 31 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 09:48:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 180 transitions. [2022-04-06 09:48:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 09:48:58,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:48:58,235 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:48:58,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-04-06 09:48:58,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 09:48:58,448 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:48:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:48:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 63889002, now seen corresponding path program 28 times [2022-04-06 09:48:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:48:58,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626760410] [2022-04-06 09:48:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:48:58,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:48:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:48:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:48:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:48:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:48:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:48:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:48:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:48:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:48:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:48:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:48:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:48:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:48:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:48:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:48:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:48:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:48:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 133 proven. 316 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:58,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:48:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626760410] [2022-04-06 09:48:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626760410] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:48:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264746231] [2022-04-06 09:48:58,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:48:58,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:48:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:48:58,625 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:48:58,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 09:48:58,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:48:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:48:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 09:48:58,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:48:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:48:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 09:48:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264746231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:48:59,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:48:59,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 24 [2022-04-06 09:48:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507569607] [2022-04-06 09:48:59,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:48:59,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 09:48:59,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:48:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 09:48:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-04-06 09:48:59,080 INFO L87 Difference]: Start difference. First operand 163 states and 180 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 16 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:48:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:48:59,967 INFO L93 Difference]: Finished difference Result 176 states and 194 transitions. [2022-04-06 09:48:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 09:48:59,967 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 16 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 130 [2022-04-06 09:48:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:48:59,968 INFO L225 Difference]: With dead ends: 176 [2022-04-06 09:48:59,968 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 09:48:59,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 09:48:59,968 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:48:59,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 99 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:48:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 09:49:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2022-04-06 09:49:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2022-04-06 09:49:00,405 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 130 [2022-04-06 09:49:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:00,406 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2022-04-06 09:49:00,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 16 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 09:49:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2022-04-06 09:49:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:00,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:00,406 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:00,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-04-06 09:49:00,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 09:49:00,621 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1115782098, now seen corresponding path program 29 times [2022-04-06 09:49:00,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:00,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885011184] [2022-04-06 09:49:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 332 proven. 163 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:01,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885011184] [2022-04-06 09:49:01,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885011184] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140148714] [2022-04-06 09:49:01,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:49:01,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:01,032 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:01,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 09:49:01,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-04-06 09:49:01,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:01,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:01,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140148714] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:01,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:01,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 09:49:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057879873] [2022-04-06 09:49:01,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:01,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 09:49:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 09:49:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=4403, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 09:49:01,980 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 74 states, 74 states have (on average 1.6216216216216217) internal successors, (120), 73 states have internal predecessors, (120), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:03,608 INFO L93 Difference]: Finished difference Result 290 states and 340 transitions. [2022-04-06 09:49:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 09:49:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.6216216216216217) internal successors, (120), 73 states have internal predecessors, (120), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:03,609 INFO L225 Difference]: With dead ends: 290 [2022-04-06 09:49:03,609 INFO L226 Difference]: Without dead ends: 234 [2022-04-06 09:49:03,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3948 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2147, Invalid=9625, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 09:49:03,610 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:03,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 87 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:49:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-04-06 09:49:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 171. [2022-04-06 09:49:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:04,091 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:04,091 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:04,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.6216216216216217) internal successors, (120), 73 states have internal predecessors, (120), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:04,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:04,092 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:04,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-04-06 09:49:04,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 09:49:04,305 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1794205614, now seen corresponding path program 92 times [2022-04-06 09:49:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:04,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516097842] [2022-04-06 09:49:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 332 proven. 149 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:04,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516097842] [2022-04-06 09:49:04,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516097842] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:04,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451582149] [2022-04-06 09:49:04,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:49:04,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:04,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:04,639 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:04,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 09:49:04,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:49:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:05,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:05,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451582149] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:05,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:05,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 73 [2022-04-06 09:49:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842151152] [2022-04-06 09:49:05,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:05,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 09:49:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 09:49:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=4306, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 09:49:05,924 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 73 states, 73 states have (on average 1.63013698630137) internal successors, (119), 72 states have internal predecessors, (119), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:08,226 INFO L93 Difference]: Finished difference Result 353 states and 420 transitions. [2022-04-06 09:49:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 09:49:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.63013698630137) internal successors, (119), 72 states have internal predecessors, (119), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:08,227 INFO L225 Difference]: With dead ends: 353 [2022-04-06 09:49:08,227 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 09:49:08,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5176 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2657, Invalid=12595, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 09:49:08,228 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:08,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 111 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:49:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 09:49:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 171. [2022-04-06 09:49:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:08,737 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:08,737 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:08,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.63013698630137) internal successors, (119), 72 states have internal predecessors, (119), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:08,738 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:08,738 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:08,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-04-06 09:49:08,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:08,952 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1714154450, now seen corresponding path program 93 times [2022-04-06 09:49:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125661517] [2022-04-06 09:49:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:08,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 332 proven. 137 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:09,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:09,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125661517] [2022-04-06 09:49:09,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125661517] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:09,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731399682] [2022-04-06 09:49:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:49:09,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:09,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:09,204 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:09,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 09:49:09,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-06 09:49:09,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:09,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:09,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:10,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731399682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:10,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:10,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 72 [2022-04-06 09:49:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45283252] [2022-04-06 09:49:10,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:10,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 09:49:10,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 09:49:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=4207, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 09:49:10,019 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 72 states, 72 states have (on average 1.6388888888888888) internal successors, (118), 71 states have internal predecessors, (118), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:13,154 INFO L93 Difference]: Finished difference Result 415 states and 499 transitions. [2022-04-06 09:49:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 09:49:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6388888888888888) internal successors, (118), 71 states have internal predecessors, (118), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:13,155 INFO L225 Difference]: With dead ends: 415 [2022-04-06 09:49:13,155 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 09:49:13,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6439 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3205, Invalid=15427, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 09:49:13,156 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:13,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 107 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:49:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 09:49:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 171. [2022-04-06 09:49:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:13,670 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:13,670 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:13,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6388888888888888) internal successors, (118), 71 states have internal predecessors, (118), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:13,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:13,671 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:13,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-04-06 09:49:13,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-06 09:49:13,881 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:13,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:13,881 INFO L85 PathProgramCache]: Analyzing trace with hash -441854034, now seen corresponding path program 94 times [2022-04-06 09:49:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:13,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80627833] [2022-04-06 09:49:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:13,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 332 proven. 127 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:14,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80627833] [2022-04-06 09:49:14,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80627833] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268417334] [2022-04-06 09:49:14,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:49:14,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:14,290 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:14,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-06 09:49:14,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:49:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:15,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:15,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268417334] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:15,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:15,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 71 [2022-04-06 09:49:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836831349] [2022-04-06 09:49:15,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:15,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 09:49:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 09:49:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=4106, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 09:49:15,532 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:19,115 INFO L93 Difference]: Finished difference Result 476 states and 577 transitions. [2022-04-06 09:49:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 09:49:19,116 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:19,116 INFO L225 Difference]: With dead ends: 476 [2022-04-06 09:49:19,116 INFO L226 Difference]: Without dead ends: 420 [2022-04-06 09:49:19,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7640 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3735, Invalid=18021, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 09:49:19,117 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 110 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:19,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 118 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:49:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-04-06 09:49:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 171. [2022-04-06 09:49:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:19,652 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:19,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:19,652 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:19,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.647887323943662) internal successors, (117), 70 states have internal predecessors, (117), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:19,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:19,653 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:19,653 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:19,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-04-06 09:49:19,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-04-06 09:49:19,857 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1370643410, now seen corresponding path program 95 times [2022-04-06 09:49:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:19,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700560557] [2022-04-06 09:49:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:19,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 332 proven. 119 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:20,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700560557] [2022-04-06 09:49:20,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700560557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579797513] [2022-04-06 09:49:20,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:49:20,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:20,268 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:20,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-06 09:49:20,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-04-06 09:49:20,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:20,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:21,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:21,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579797513] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:21,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:21,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 70 [2022-04-06 09:49:21,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738896810] [2022-04-06 09:49:21,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:21,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 09:49:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 09:49:21,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=4003, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 09:49:21,481 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 70 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 69 states have internal predecessors, (116), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:25,991 INFO L93 Difference]: Finished difference Result 536 states and 654 transitions. [2022-04-06 09:49:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 09:49:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 69 states have internal predecessors, (116), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:25,993 INFO L225 Difference]: With dead ends: 536 [2022-04-06 09:49:25,993 INFO L226 Difference]: Without dead ends: 480 [2022-04-06 09:49:25,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8729 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4214, Invalid=20278, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 09:49:25,994 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:25,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 99 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:49:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-04-06 09:49:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 171. [2022-04-06 09:49:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:26,523 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:26,523 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:26,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 69 states have internal predecessors, (116), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:26,524 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:26,524 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:26,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-04-06 09:49:26,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:26,740 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1816246354, now seen corresponding path program 96 times [2022-04-06 09:49:26,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:26,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172214291] [2022-04-06 09:49:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:26,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 332 proven. 113 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:27,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172214291] [2022-04-06 09:49:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172214291] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478145698] [2022-04-06 09:49:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:49:27,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:27,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:27,130 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:27,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-06 09:49:27,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 09:49:27,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:27,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:28,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478145698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:28,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:28,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 69 [2022-04-06 09:49:28,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111702709] [2022-04-06 09:49:28,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:28,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 09:49:28,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 09:49:28,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=3898, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 09:49:28,196 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:33,571 INFO L93 Difference]: Finished difference Result 595 states and 730 transitions. [2022-04-06 09:49:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 09:49:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:33,573 INFO L225 Difference]: With dead ends: 595 [2022-04-06 09:49:33,573 INFO L226 Difference]: Without dead ends: 539 [2022-04-06 09:49:33,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9651 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4615, Invalid=22117, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 09:49:33,574 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 155 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:33,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 134 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:49:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-04-06 09:49:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 171. [2022-04-06 09:49:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:34,146 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:34,146 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:34,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:34,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:34,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:34,147 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:34,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-04-06 09:49:34,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:34,363 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1276431314, now seen corresponding path program 97 times [2022-04-06 09:49:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507269915] [2022-04-06 09:49:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 332 proven. 109 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:34,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507269915] [2022-04-06 09:49:34,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507269915] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453636428] [2022-04-06 09:49:34,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:49:34,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:34,719 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:34,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-04-06 09:49:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:35,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:35,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453636428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:35,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:35,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 68 [2022-04-06 09:49:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572615813] [2022-04-06 09:49:35,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:35,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 09:49:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 09:49:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3791, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 09:49:35,876 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 68 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 67 states have internal predecessors, (114), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:41,784 INFO L93 Difference]: Finished difference Result 653 states and 805 transitions. [2022-04-06 09:49:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 09:49:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 67 states have internal predecessors, (114), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:41,785 INFO L225 Difference]: With dead ends: 653 [2022-04-06 09:49:41,785 INFO L226 Difference]: Without dead ends: 597 [2022-04-06 09:49:41,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10363 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4917, Invalid=23475, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 09:49:41,787 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 149 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:41,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 132 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:49:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-04-06 09:49:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 171. [2022-04-06 09:49:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:42,402 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:42,402 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:42,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 67 states have internal predecessors, (114), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:42,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:42,403 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:42,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-04-06 09:49:42,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:42,618 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1674659922, now seen corresponding path program 98 times [2022-04-06 09:49:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:42,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131248019] [2022-04-06 09:49:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:42,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 332 proven. 107 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131248019] [2022-04-06 09:49:42,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131248019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919273724] [2022-04-06 09:49:42,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:49:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:42,990 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:42,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-04-06 09:49:43,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:49:43,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:43,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:43,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:44,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919273724] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:44,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:44,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 67 [2022-04-06 09:49:44,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289039530] [2022-04-06 09:49:44,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:44,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 09:49:44,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 09:49:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=3682, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 09:49:44,145 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 67 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 66 states have internal predecessors, (113), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:50,238 INFO L93 Difference]: Finished difference Result 710 states and 879 transitions. [2022-04-06 09:49:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 09:49:50,239 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 66 states have internal predecessors, (113), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:50,240 INFO L225 Difference]: With dead ends: 710 [2022-04-06 09:49:50,240 INFO L226 Difference]: Without dead ends: 654 [2022-04-06 09:49:50,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10834 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5105, Invalid=24307, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 09:49:50,241 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 172 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:50,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 132 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:49:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-04-06 09:49:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 171. [2022-04-06 09:49:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:50,800 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:50,800 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:50,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 66 states have internal predecessors, (113), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:50,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:50,800 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:50,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-04-06 09:49:51,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-04-06 09:49:51,016 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:51,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1548958674, now seen corresponding path program 99 times [2022-04-06 09:49:51,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:51,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495641205] [2022-04-06 09:49:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:51,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:49:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:49:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:49:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:49:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:49:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:49:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:49:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:49:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:49:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:49:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:49:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:49:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:49:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:49:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:49:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:49:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:49:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 332 proven. 107 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:49:51,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495641205] [2022-04-06 09:49:51,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495641205] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:49:51,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177665497] [2022-04-06 09:49:51,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:49:51,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:49:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:49:51,403 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:49:51,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-04-06 09:49:51,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-06 09:49:51,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:49:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:49:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:49:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:52,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:49:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:49:52,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177665497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:49:52,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:49:52,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 66 [2022-04-06 09:49:52,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561522379] [2022-04-06 09:49:52,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:49:52,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 09:49:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:49:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 09:49:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=3571, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 09:49:52,519 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 66 states, 66 states have (on average 1.696969696969697) internal successors, (112), 65 states have internal predecessors, (112), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:49:58,871 INFO L93 Difference]: Finished difference Result 766 states and 952 transitions. [2022-04-06 09:49:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 09:49:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.696969696969697) internal successors, (112), 65 states have internal predecessors, (112), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:49:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:49:58,873 INFO L225 Difference]: With dead ends: 766 [2022-04-06 09:49:58,873 INFO L226 Difference]: Without dead ends: 710 [2022-04-06 09:49:58,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11045 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5170, Invalid=24586, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 09:49:58,874 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 249 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:49:58,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 86 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:49:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-04-06 09:49:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 171. [2022-04-06 09:49:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:49:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:49:59,435 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:49:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:49:59,435 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:49:59,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.696969696969697) internal successors, (112), 65 states have internal predecessors, (112), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:49:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:49:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:49:59,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:49:59,436 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:49:59,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-04-06 09:49:59,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-04-06 09:49:59,647 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:49:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:49:59,648 INFO L85 PathProgramCache]: Analyzing trace with hash -436525138, now seen corresponding path program 100 times [2022-04-06 09:49:59,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:49:59,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959804225] [2022-04-06 09:49:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:49:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:49:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:50:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:50:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:50:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:50:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:50:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:50:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:50:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:50:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:50:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:50:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:50:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:50:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:50:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:50:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:50:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:50:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 332 proven. 109 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:50:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959804225] [2022-04-06 09:50:00,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959804225] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:50:00,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053162792] [2022-04-06 09:50:00,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:50:00,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:50:00,032 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:50:00,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-04-06 09:50:00,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:50:00,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:50:00,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:50:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:50:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:00,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:50:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:01,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053162792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:50:01,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:50:01,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 65 [2022-04-06 09:50:01,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720737662] [2022-04-06 09:50:01,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:50:01,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 09:50:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:50:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 09:50:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=3458, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 09:50:01,148 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 65 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 64 states have internal predecessors, (111), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:07,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:50:07,952 INFO L93 Difference]: Finished difference Result 821 states and 1024 transitions. [2022-04-06 09:50:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 09:50:07,952 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 64 states have internal predecessors, (111), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:50:07,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:50:07,954 INFO L225 Difference]: With dead ends: 821 [2022-04-06 09:50:07,954 INFO L226 Difference]: Without dead ends: 765 [2022-04-06 09:50:07,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10984 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5109, Invalid=24303, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 09:50:07,955 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 265 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:50:07,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 107 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:50:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-04-06 09:50:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 171. [2022-04-06 09:50:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:50:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:50:08,559 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:50:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:50:08,559 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:50:08,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 64 states have internal predecessors, (111), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:50:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:50:08,560 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:50:08,560 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:50:08,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-04-06 09:50:08,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-04-06 09:50:08,776 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:50:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:50:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1231924178, now seen corresponding path program 101 times [2022-04-06 09:50:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:50:08,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178864912] [2022-04-06 09:50:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:50:08,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:50:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:50:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:50:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:50:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:50:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:50:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:50:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:50:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:50:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:50:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:50:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:50:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:50:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:50:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:50:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:50:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:50:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 332 proven. 113 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:09,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:50:09,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178864912] [2022-04-06 09:50:09,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178864912] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:50:09,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608856887] [2022-04-06 09:50:09,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:50:09,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:09,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:50:09,097 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:50:09,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-04-06 09:50:09,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-04-06 09:50:09,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:50:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:50:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:50:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:09,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:50:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:10,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608856887] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:50:10,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:50:10,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 64 [2022-04-06 09:50:10,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107151404] [2022-04-06 09:50:10,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:50:10,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 09:50:10,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:50:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 09:50:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=3343, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 09:50:10,013 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 64 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:50:16,980 INFO L93 Difference]: Finished difference Result 875 states and 1095 transitions. [2022-04-06 09:50:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 09:50:16,980 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:50:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:50:16,982 INFO L225 Difference]: With dead ends: 875 [2022-04-06 09:50:16,982 INFO L226 Difference]: Without dead ends: 819 [2022-04-06 09:50:16,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10641 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4925, Invalid=23467, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 09:50:16,983 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 280 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:50:16,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 99 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:50:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-04-06 09:50:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 171. [2022-04-06 09:50:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:50:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:50:17,557 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:50:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:50:17,557 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:50:17,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:50:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:50:17,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:50:17,558 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:50:17,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-04-06 09:50:17,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:17,774 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:50:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:50:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash 404985774, now seen corresponding path program 102 times [2022-04-06 09:50:17,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:50:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938774045] [2022-04-06 09:50:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:50:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:50:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:50:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:50:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:50:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:50:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:50:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:50:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:50:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:50:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:50:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:50:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:50:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:50:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:50:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:50:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:50:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:50:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 332 proven. 119 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:18,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:50:18,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938774045] [2022-04-06 09:50:18,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938774045] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:50:18,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624099754] [2022-04-06 09:50:18,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:50:18,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:50:18,096 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:50:18,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-04-06 09:50:18,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 09:50:18,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:50:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:50:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:50:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:19,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:50:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:19,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624099754] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:50:19,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:50:19,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 63 [2022-04-06 09:50:19,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303843885] [2022-04-06 09:50:19,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:50:19,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 09:50:19,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:50:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 09:50:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=3226, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 09:50:19,263 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:50:26,407 INFO L93 Difference]: Finished difference Result 928 states and 1165 transitions. [2022-04-06 09:50:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 09:50:26,408 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:50:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:50:26,409 INFO L225 Difference]: With dead ends: 928 [2022-04-06 09:50:26,409 INFO L226 Difference]: Without dead ends: 872 [2022-04-06 09:50:26,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10017 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4627, Invalid=22105, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 09:50:26,411 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 351 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:50:26,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 108 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:50:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-04-06 09:50:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 171. [2022-04-06 09:50:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:50:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:50:26,982 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:50:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:50:26,982 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:50:26,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:50:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:50:26,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:50:26,982 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:50:27,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-04-06 09:50:27,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-04-06 09:50:27,199 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:50:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:50:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1704715310, now seen corresponding path program 103 times [2022-04-06 09:50:27,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:50:27,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875470052] [2022-04-06 09:50:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:50:27,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:50:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:50:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:50:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:50:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:50:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:50:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:50:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:50:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:50:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:50:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:50:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:50:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:50:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:50:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:50:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:50:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:50:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 332 proven. 127 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:27,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:50:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875470052] [2022-04-06 09:50:27,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875470052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:50:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962928865] [2022-04-06 09:50:27,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:50:27,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:27,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:50:27,521 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:50:27,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-04-06 09:50:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:27,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:50:27,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:50:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:28,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:50:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:28,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962928865] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:50:28,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:50:28,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 62 [2022-04-06 09:50:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036254113] [2022-04-06 09:50:28,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:50:28,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 09:50:28,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:50:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 09:50:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3107, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 09:50:28,642 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 61 states have internal predecessors, (108), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:50:36,360 INFO L93 Difference]: Finished difference Result 980 states and 1234 transitions. [2022-04-06 09:50:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 09:50:36,360 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 61 states have internal predecessors, (108), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:50:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:50:36,376 INFO L225 Difference]: With dead ends: 980 [2022-04-06 09:50:36,376 INFO L226 Difference]: Without dead ends: 924 [2022-04-06 09:50:36,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9125 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4230, Invalid=20262, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 09:50:36,377 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 312 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:50:36,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 111 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:50:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-04-06 09:50:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 171. [2022-04-06 09:50:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:50:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:50:36,966 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:50:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:50:36,966 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:50:36,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 61 states have internal predecessors, (108), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:50:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:50:36,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:50:36,967 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:50:36,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-04-06 09:50:37,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-04-06 09:50:37,183 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:50:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:50:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1717041234, now seen corresponding path program 104 times [2022-04-06 09:50:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:50:37,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497156485] [2022-04-06 09:50:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:50:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:50:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:50:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:50:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:50:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:50:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:50:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:50:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:50:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:50:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:50:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:50:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:50:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:50:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:50:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:50:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:50:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:50:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 332 proven. 137 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:37,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:50:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497156485] [2022-04-06 09:50:37,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497156485] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:50:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035353531] [2022-04-06 09:50:37,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:50:37,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:37,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:50:37,570 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:50:37,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-04-06 09:50:37,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:50:37,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:50:37,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:50:37,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:50:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:38,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:50:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:38,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035353531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:50:38,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:50:38,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 61 [2022-04-06 09:50:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358074129] [2022-04-06 09:50:38,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:50:38,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 09:50:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:50:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 09:50:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 09:50:38,485 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 61 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 60 states have internal predecessors, (107), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:50:45,920 INFO L93 Difference]: Finished difference Result 1031 states and 1302 transitions. [2022-04-06 09:50:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 09:50:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 60 states have internal predecessors, (107), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:50:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:50:45,922 INFO L225 Difference]: With dead ends: 1031 [2022-04-06 09:50:45,922 INFO L226 Difference]: Without dead ends: 975 [2022-04-06 09:50:45,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7990 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3755, Invalid=18001, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 09:50:45,923 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 308 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:50:45,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 107 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:50:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-04-06 09:50:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 171. [2022-04-06 09:50:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:50:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:50:46,533 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:50:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:50:46,533 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:50:46,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 60 states have internal predecessors, (107), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:50:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:50:46,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:50:46,534 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:50:46,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-04-06 09:50:46,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:46,735 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:50:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:50:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1774810158, now seen corresponding path program 105 times [2022-04-06 09:50:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:50:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791372025] [2022-04-06 09:50:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:50:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:50:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:50:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:50:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:50:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:50:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:50:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:50:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:50:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:50:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:50:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:50:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:50:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:50:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:50:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:50:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:50:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:50:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 332 proven. 149 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:47,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:50:47,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791372025] [2022-04-06 09:50:47,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791372025] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:50:47,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360088245] [2022-04-06 09:50:47,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:50:47,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:47,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:50:47,134 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:50:47,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-04-06 09:50:47,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-06 09:50:47,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:50:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:50:47,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:50:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:47,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:50:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:48,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360088245] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:50:48,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:50:48,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 60 [2022-04-06 09:50:48,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251069814] [2022-04-06 09:50:48,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:50:48,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 09:50:48,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:50:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 09:50:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=2863, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 09:50:48,245 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 60 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 59 states have internal predecessors, (106), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:50:55,670 INFO L93 Difference]: Finished difference Result 1081 states and 1369 transitions. [2022-04-06 09:50:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 09:50:55,670 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 59 states have internal predecessors, (106), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:50:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:50:55,672 INFO L225 Difference]: With dead ends: 1081 [2022-04-06 09:50:55,672 INFO L226 Difference]: Without dead ends: 1025 [2022-04-06 09:50:55,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6615 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3229, Invalid=15403, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 09:50:55,673 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 354 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:50:55,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 96 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:50:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-04-06 09:50:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 171. [2022-04-06 09:50:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:50:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2022-04-06 09:50:56,257 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 137 [2022-04-06 09:50:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:50:56,257 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2022-04-06 09:50:56,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 59 states have internal predecessors, (106), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:50:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2022-04-06 09:50:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 09:50:56,257 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:50:56,257 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:50:56,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-04-06 09:50:56,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-04-06 09:50:56,473 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:50:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:50:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1853327442, now seen corresponding path program 15 times [2022-04-06 09:50:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:50:56,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909190954] [2022-04-06 09:50:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:50:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:50:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:50:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 09:50:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:50:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 09:50:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 09:50:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 09:50:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 09:50:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 09:50:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:50:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 09:50:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 09:50:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 09:50:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 09:50:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 09:50:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 09:50:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 09:50:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:50:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 332 proven. 163 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:56,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:50:56,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909190954] [2022-04-06 09:50:56,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909190954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:50:56,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306724728] [2022-04-06 09:50:56,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:50:56,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:50:56,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:50:56,870 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:50:56,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-04-06 09:50:56,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-04-06 09:50:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:50:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 09:50:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:50:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:57,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:50:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:50:57,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306724728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:50:57,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:50:57,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 59 [2022-04-06 09:50:57,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566834620] [2022-04-06 09:50:57,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:50:57,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 09:50:57,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:50:57,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 09:50:57,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 09:50:57,977 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 59 states, 59 states have (on average 1.7796610169491525) internal successors, (105), 58 states have internal predecessors, (105), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:51:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:05,534 INFO L93 Difference]: Finished difference Result 1133 states and 1439 transitions. [2022-04-06 09:51:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 09:51:05,535 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7796610169491525) internal successors, (105), 58 states have internal predecessors, (105), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 137 [2022-04-06 09:51:05,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:05,536 INFO L225 Difference]: With dead ends: 1133 [2022-04-06 09:51:05,536 INFO L226 Difference]: Without dead ends: 1077 [2022-04-06 09:51:05,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2702, Invalid=12550, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 09:51:05,539 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 544 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:05,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 98 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:51:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-04-06 09:51:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 173. [2022-04-06 09:51:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 137 states have (on average 1.1386861313868613) internal successors, (156), 138 states have internal predecessors, (156), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:51:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-04-06 09:51:06,191 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 137 [2022-04-06 09:51:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:06,192 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-04-06 09:51:06,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7796610169491525) internal successors, (105), 58 states have internal predecessors, (105), 33 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 09:51:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-04-06 09:51:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 09:51:06,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:06,192 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:06,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-04-06 09:51:06,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:06,408 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 481754638, now seen corresponding path program 30 times [2022-04-06 09:51:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:06,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109763732] [2022-04-06 09:51:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:06,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 150 proven. 361 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:51:06,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109763732] [2022-04-06 09:51:06,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109763732] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401518059] [2022-04-06 09:51:06,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:51:06,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:06,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:06,578 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:06,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-04-06 09:51:06,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 09:51:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:51:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 09:51:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 166 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:51:06,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 166 proven. 345 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 09:51:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401518059] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:07,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:07,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 25 [2022-04-06 09:51:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020931295] [2022-04-06 09:51:07,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:07,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 09:51:07,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 09:51:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-04-06 09:51:07,025 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 22 states have internal predecessors, (71), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:51:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:08,052 INFO L93 Difference]: Finished difference Result 186 states and 205 transitions. [2022-04-06 09:51:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 09:51:08,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 22 states have internal predecessors, (71), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 138 [2022-04-06 09:51:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:08,053 INFO L225 Difference]: With dead ends: 186 [2022-04-06 09:51:08,053 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 09:51:08,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=550, Invalid=1520, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 09:51:08,054 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 98 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:08,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 101 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:51:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 09:51:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-04-06 09:51:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 198 transitions. [2022-04-06 09:51:08,643 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 198 transitions. Word has length 138 [2022-04-06 09:51:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:08,644 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 198 transitions. [2022-04-06 09:51:08,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 22 states have internal predecessors, (71), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 09:51:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 198 transitions. [2022-04-06 09:51:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:08,644 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:08,644 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:08,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-04-06 09:51:08,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:08,845 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash 541475850, now seen corresponding path program 31 times [2022-04-06 09:51:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:08,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132693556] [2022-04-06 09:51:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:08,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:51:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:09,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:09,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132693556] [2022-04-06 09:51:09,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132693556] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:09,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537028291] [2022-04-06 09:51:09,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:51:09,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:09,303 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:09,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-04-06 09:51:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:09,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:51:09,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:10,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:10,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537028291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:10,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:10,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 09:51:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001448517] [2022-04-06 09:51:10,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:10,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 09:51:10,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 09:51:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1111, Invalid=4895, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 09:51:10,603 INFO L87 Difference]: Start difference. First operand 180 states and 198 transitions. Second operand has 78 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 77 states have internal predecessors, (126), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:12,577 INFO L93 Difference]: Finished difference Result 307 states and 360 transitions. [2022-04-06 09:51:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 09:51:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 77 states have internal predecessors, (126), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:51:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:12,578 INFO L225 Difference]: With dead ends: 307 [2022-04-06 09:51:12,578 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 09:51:12,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2380, Invalid=10730, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 09:51:12,578 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:12,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 103 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:51:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 09:51:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 181. [2022-04-06 09:51:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:51:13,211 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:51:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:13,212 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:51:13,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6153846153846154) internal successors, (126), 77 states have internal predecessors, (126), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:51:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:13,212 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:13,212 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:13,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-04-06 09:51:13,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:13,428 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 207464330, now seen corresponding path program 106 times [2022-04-06 09:51:13,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:13,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079769885] [2022-04-06 09:51:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:51:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 378 proven. 167 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:13,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079769885] [2022-04-06 09:51:13,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079769885] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:13,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511425233] [2022-04-06 09:51:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:51:13,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:13,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:13,708 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:13,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-04-06 09:51:13,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:51:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:51:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:51:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:14,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:14,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511425233] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:14,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:14,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 77 [2022-04-06 09:51:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841107880] [2022-04-06 09:51:14,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:14,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 09:51:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 09:51:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1059, Invalid=4793, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 09:51:14,628 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 76 states have internal predecessors, (125), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:17,621 INFO L93 Difference]: Finished difference Result 374 states and 445 transitions. [2022-04-06 09:51:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 09:51:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 76 states have internal predecessors, (125), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:51:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:17,622 INFO L225 Difference]: With dead ends: 374 [2022-04-06 09:51:17,622 INFO L226 Difference]: Without dead ends: 315 [2022-04-06 09:51:17,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5815 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2956, Invalid=14074, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 09:51:17,623 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 76 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:17,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 128 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:51:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-04-06 09:51:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 181. [2022-04-06 09:51:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:51:18,286 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:51:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:18,286 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:51:18,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 76 states have internal predecessors, (125), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:51:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:18,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:18,286 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:18,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-04-06 09:51:18,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:18,503 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1443615754, now seen corresponding path program 107 times [2022-04-06 09:51:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693070586] [2022-04-06 09:51:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:51:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 378 proven. 154 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:18,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693070586] [2022-04-06 09:51:18,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693070586] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575305787] [2022-04-06 09:51:18,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:51:18,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:18,904 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:18,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-04-06 09:51:18,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-04-06 09:51:18,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:51:18,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:51:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:19,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:20,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575305787] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:20,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:20,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 76 [2022-04-06 09:51:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116259384] [2022-04-06 09:51:20,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:20,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 09:51:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 09:51:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=4689, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 09:51:20,080 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 76 states, 76 states have (on average 1.631578947368421) internal successors, (124), 75 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:24,192 INFO L93 Difference]: Finished difference Result 440 states and 529 transitions. [2022-04-06 09:51:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 09:51:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.631578947368421) internal successors, (124), 75 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:51:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:24,193 INFO L225 Difference]: With dead ends: 440 [2022-04-06 09:51:24,193 INFO L226 Difference]: Without dead ends: 381 [2022-04-06 09:51:24,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3581, Invalid=17299, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 09:51:24,195 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:24,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 123 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:51:24,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-06 09:51:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 181. [2022-04-06 09:51:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:51:24,881 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:51:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:24,881 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:51:24,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.631578947368421) internal successors, (124), 75 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:51:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:24,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:24,882 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:24,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-04-06 09:51:25,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:25,096 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1067849610, now seen corresponding path program 108 times [2022-04-06 09:51:25,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:25,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009860610] [2022-04-06 09:51:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:25,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:51:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 378 proven. 143 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009860610] [2022-04-06 09:51:25,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009860610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470265803] [2022-04-06 09:51:25,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:51:25,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:25,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:25,464 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:25,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-04-06 09:51:25,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-04-06 09:51:25,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:51:25,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:51:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:26,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:26,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470265803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:26,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:26,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 75 [2022-04-06 09:51:26,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474500762] [2022-04-06 09:51:26,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:26,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 09:51:26,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:26,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 09:51:26,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=967, Invalid=4583, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 09:51:26,810 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 75 states, 75 states have (on average 1.64) internal successors, (123), 74 states have internal predecessors, (123), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:31,735 INFO L93 Difference]: Finished difference Result 505 states and 612 transitions. [2022-04-06 09:51:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 09:51:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.64) internal successors, (123), 74 states have internal predecessors, (123), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:51:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:31,737 INFO L225 Difference]: With dead ends: 505 [2022-04-06 09:51:31,737 INFO L226 Difference]: Without dead ends: 446 [2022-04-06 09:51:31,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4195, Invalid=20297, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 09:51:31,738 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:31,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 133 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:51:31,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-04-06 09:51:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 181. [2022-04-06 09:51:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:51:32,437 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:51:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:32,437 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:51:32,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.64) internal successors, (123), 74 states have internal predecessors, (123), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:51:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:32,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:32,437 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:32,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-04-06 09:51:32,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-04-06 09:51:32,653 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1609917450, now seen corresponding path program 109 times [2022-04-06 09:51:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:32,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072775722] [2022-04-06 09:51:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:32,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:51:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 378 proven. 134 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072775722] [2022-04-06 09:51:33,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072775722] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692348622] [2022-04-06 09:51:33,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:51:33,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:33,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:33,113 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:33,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-04-06 09:51:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:51:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:34,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692348622] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:34,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:34,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 74 [2022-04-06 09:51:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003358583] [2022-04-06 09:51:34,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:34,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 09:51:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:34,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 09:51:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=4475, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 09:51:34,521 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:40,298 INFO L93 Difference]: Finished difference Result 569 states and 694 transitions. [2022-04-06 09:51:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 09:51:40,298 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:51:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:40,299 INFO L225 Difference]: With dead ends: 569 [2022-04-06 09:51:40,299 INFO L226 Difference]: Without dead ends: 510 [2022-04-06 09:51:40,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9942 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4762, Invalid=22960, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 09:51:40,301 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 133 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:40,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 112 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:51:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-04-06 09:51:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 181. [2022-04-06 09:51:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:51:41,028 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:51:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:41,028 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:51:41,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 73 states have internal predecessors, (122), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:51:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:41,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:41,029 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:41,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-04-06 09:51:41,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-04-06 09:51:41,239 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:41,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1974827126, now seen corresponding path program 110 times [2022-04-06 09:51:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461503102] [2022-04-06 09:51:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:51:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 378 proven. 127 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:41,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461503102] [2022-04-06 09:51:41,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461503102] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159319477] [2022-04-06 09:51:41,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:51:41,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:41,672 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:41,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-04-06 09:51:41,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:51:41,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:51:41,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:51:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:42,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:42,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159319477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:42,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:42,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 73 [2022-04-06 09:51:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104549714] [2022-04-06 09:51:42,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:42,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 09:51:42,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 09:51:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4365, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 09:51:42,895 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 73 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 72 states have internal predecessors, (121), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:49,264 INFO L93 Difference]: Finished difference Result 632 states and 775 transitions. [2022-04-06 09:51:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 09:51:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 72 states have internal predecessors, (121), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:51:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:49,265 INFO L225 Difference]: With dead ends: 632 [2022-04-06 09:51:49,265 INFO L226 Difference]: Without dead ends: 573 [2022-04-06 09:51:49,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11065 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5252, Invalid=25198, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 09:51:49,267 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 156 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:49,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 104 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:51:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-04-06 09:51:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 181. [2022-04-06 09:51:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:51:49,996 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:51:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:49,996 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:51:49,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 72 states have internal predecessors, (121), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:51:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:49,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:49,996 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:50,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-04-06 09:51:50,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-04-06 09:51:50,211 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:51:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:51:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash -150801398, now seen corresponding path program 111 times [2022-04-06 09:51:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:51:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753044404] [2022-04-06 09:51:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:51:50,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:51:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:51:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:51:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:51:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:51:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:51:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:51:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:51:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:51:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:51:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:51:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:51:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:51:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:51:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:51:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:51:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:51:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:51:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:51:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 378 proven. 122 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:50,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:51:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753044404] [2022-04-06 09:51:50,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753044404] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:51:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968398815] [2022-04-06 09:51:50,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:51:50,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:51:50,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:51:50,581 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:51:50,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-04-06 09:51:50,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-04-06 09:51:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:51:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:51:50,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:51:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:51,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:51:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:51:51,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968398815] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:51:51,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:51:51,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 72 [2022-04-06 09:51:51,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991157640] [2022-04-06 09:51:51,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:51:51,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 09:51:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:51:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 09:51:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=4253, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 09:51:51,851 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:51:59,161 INFO L93 Difference]: Finished difference Result 694 states and 855 transitions. [2022-04-06 09:51:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 09:51:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:51:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:51:59,162 INFO L225 Difference]: With dead ends: 694 [2022-04-06 09:51:59,162 INFO L226 Difference]: Without dead ends: 635 [2022-04-06 09:51:59,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11973 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5641, Invalid=26939, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 09:51:59,164 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 236 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:51:59,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 103 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:51:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-04-06 09:51:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 181. [2022-04-06 09:51:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:51:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:51:59,906 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:51:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:51:59,906 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:51:59,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:51:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:51:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:51:59,906 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:51:59,907 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:51:59,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-04-06 09:52:00,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:00,119 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:52:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:52:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash 323680138, now seen corresponding path program 112 times [2022-04-06 09:52:00,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:52:00,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354794466] [2022-04-06 09:52:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:52:00,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:52:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:52:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:52:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:52:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:52:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:52:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:52:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:52:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:52:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:52:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:52:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:52:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:52:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:52:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:52:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:52:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:52:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:52:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 378 proven. 119 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:00,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:52:00,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354794466] [2022-04-06 09:52:00,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354794466] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:52:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327290628] [2022-04-06 09:52:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:52:00,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:52:00,511 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:52:00,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-04-06 09:52:00,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:52:00,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:52:00,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:52:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:52:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:01,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:52:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:01,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327290628] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:52:01,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:52:01,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 71 [2022-04-06 09:52:01,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840380485] [2022-04-06 09:52:01,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:52:01,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 09:52:01,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:52:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 09:52:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=4139, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 09:52:01,629 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 71 states, 71 states have (on average 1.676056338028169) internal successors, (119), 70 states have internal predecessors, (119), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:52:09,628 INFO L93 Difference]: Finished difference Result 755 states and 934 transitions. [2022-04-06 09:52:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-04-06 09:52:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.676056338028169) internal successors, (119), 70 states have internal predecessors, (119), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:52:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:52:09,629 INFO L225 Difference]: With dead ends: 755 [2022-04-06 09:52:09,629 INFO L226 Difference]: Without dead ends: 696 [2022-04-06 09:52:09,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12629 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5911, Invalid=28129, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 09:52:09,631 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 167 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:52:09,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 149 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:52:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-04-06 09:52:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 181. [2022-04-06 09:52:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:52:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:52:10,396 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:52:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:52:10,396 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:52:10,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.676056338028169) internal successors, (119), 70 states have internal predecessors, (119), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:52:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:52:10,397 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:52:10,397 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:52:10,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-04-06 09:52:10,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:10,611 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:52:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:52:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash 338985994, now seen corresponding path program 113 times [2022-04-06 09:52:10,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:52:10,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828643866] [2022-04-06 09:52:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:52:10,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:52:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:52:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:52:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:52:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:52:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:52:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:52:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:52:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:52:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:52:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:52:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:52:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:52:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:52:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:52:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:52:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:52:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:52:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 378 proven. 118 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:10,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:52:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828643866] [2022-04-06 09:52:10,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828643866] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:52:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858507934] [2022-04-06 09:52:10,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:52:10,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:52:10,995 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:52:10,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-04-06 09:52:11,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-04-06 09:52:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:52:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:52:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:52:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 424 proven. 72 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:11,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:52:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 424 proven. 72 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:12,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858507934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:52:12,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:52:12,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 70 [2022-04-06 09:52:12,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446201745] [2022-04-06 09:52:12,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:52:12,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 09:52:12,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:52:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 09:52:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=4023, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 09:52:12,113 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 70 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 69 states have internal predecessors, (118), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:52:20,592 INFO L93 Difference]: Finished difference Result 815 states and 1012 transitions. [2022-04-06 09:52:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 09:52:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 69 states have internal predecessors, (118), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:52:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:52:20,594 INFO L225 Difference]: With dead ends: 815 [2022-04-06 09:52:20,594 INFO L226 Difference]: Without dead ends: 756 [2022-04-06 09:52:20,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13008 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6050, Invalid=28732, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 09:52:20,595 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 250 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:52:20,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 108 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:52:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-04-06 09:52:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 181. [2022-04-06 09:52:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:52:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:52:21,336 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:52:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:52:21,336 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:52:21,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6857142857142857) internal successors, (118), 69 states have internal predecessors, (118), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:52:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:52:21,337 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:52:21,337 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:52:21,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-04-06 09:52:21,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:21,553 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:52:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:52:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1045993590, now seen corresponding path program 114 times [2022-04-06 09:52:21,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:52:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166465800] [2022-04-06 09:52:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:52:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:52:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:52:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:52:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:52:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:52:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:52:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:52:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:52:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:52:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:52:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:52:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:52:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:52:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:52:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:52:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:52:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:52:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:52:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 378 proven. 119 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:21,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:52:21,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166465800] [2022-04-06 09:52:21,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166465800] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:52:21,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024065472] [2022-04-06 09:52:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:52:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:52:21,927 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:52:21,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-04-06 09:52:22,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-04-06 09:52:22,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:52:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:52:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:52:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:22,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:52:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 424 proven. 73 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:22,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024065472] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:52:22,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:52:22,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 69 [2022-04-06 09:52:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025239345] [2022-04-06 09:52:22,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:52:22,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 09:52:22,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:52:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 09:52:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3905, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 09:52:22,768 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 68 states have internal predecessors, (117), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:52:31,394 INFO L93 Difference]: Finished difference Result 874 states and 1089 transitions. [2022-04-06 09:52:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-04-06 09:52:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 68 states have internal predecessors, (117), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:52:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:52:31,395 INFO L225 Difference]: With dead ends: 874 [2022-04-06 09:52:31,395 INFO L226 Difference]: Without dead ends: 815 [2022-04-06 09:52:31,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13096 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6052, Invalid=28730, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 09:52:31,397 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 266 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:52:31,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 102 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:52:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-04-06 09:52:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 181. [2022-04-06 09:52:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:52:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:52:32,143 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:52:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:52:32,143 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:52:32,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 68 states have internal predecessors, (117), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:52:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:52:32,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:52:32,143 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:52:32,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-04-06 09:52:32,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:32,359 INFO L403 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:52:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:52:32,359 INFO L85 PathProgramCache]: Analyzing trace with hash -259386358, now seen corresponding path program 115 times [2022-04-06 09:52:32,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:52:32,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958759819] [2022-04-06 09:52:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:52:32,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:52:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:52:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:52:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:52:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:52:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:52:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:52:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:52:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:52:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:52:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:52:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:52:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:52:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:52:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:52:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:52:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:52:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:52:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 378 proven. 122 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:32,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:52:32,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958759819] [2022-04-06 09:52:32,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958759819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:52:32,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494547181] [2022-04-06 09:52:32,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:52:32,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:52:32,783 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:52:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-04-06 09:52:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:52:32,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:52:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:33,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:52:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 424 proven. 76 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:34,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494547181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:52:34,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:52:34,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 68 [2022-04-06 09:52:34,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91587955] [2022-04-06 09:52:34,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:52:34,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 09:52:34,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:52:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 09:52:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 09:52:34,068 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 67 states have internal predecessors, (116), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:52:43,303 INFO L93 Difference]: Finished difference Result 932 states and 1165 transitions. [2022-04-06 09:52:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 09:52:43,304 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 67 states have internal predecessors, (116), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:52:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:52:43,305 INFO L225 Difference]: With dead ends: 932 [2022-04-06 09:52:43,305 INFO L226 Difference]: Without dead ends: 873 [2022-04-06 09:52:43,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12881 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5917, Invalid=28123, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 09:52:43,307 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 257 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:52:43,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 108 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:52:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-04-06 09:52:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 181. [2022-04-06 09:52:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:52:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:52:44,115 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:52:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:52:44,115 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:52:44,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 67 states have internal predecessors, (116), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:52:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:52:44,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:52:44,115 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:52:44,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-04-06 09:52:44,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:44,331 INFO L403 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:52:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:52:44,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1012914058, now seen corresponding path program 116 times [2022-04-06 09:52:44,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:52:44,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195772243] [2022-04-06 09:52:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:52:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:52:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:52:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:52:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:52:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:52:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:52:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:52:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:52:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:52:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:52:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:52:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:52:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:52:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:52:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:52:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:52:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:52:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:52:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 378 proven. 127 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:44,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:52:44,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195772243] [2022-04-06 09:52:44,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195772243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:52:44,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329650668] [2022-04-06 09:52:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:52:44,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:44,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:52:44,735 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:52:44,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-04-06 09:52:44,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:52:44,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:52:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:52:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:52:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:45,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:52:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 424 proven. 81 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:45,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329650668] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:52:45,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:52:45,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 67 [2022-04-06 09:52:45,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613094510] [2022-04-06 09:52:45,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:52:45,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 09:52:45,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:52:45,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 09:52:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=3663, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 09:52:45,606 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:52:55,146 INFO L93 Difference]: Finished difference Result 989 states and 1240 transitions. [2022-04-06 09:52:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-04-06 09:52:55,147 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:52:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:52:55,148 INFO L225 Difference]: With dead ends: 989 [2022-04-06 09:52:55,148 INFO L226 Difference]: Without dead ends: 930 [2022-04-06 09:52:55,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12358 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5651, Invalid=26929, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 09:52:55,150 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 322 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:52:55,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 128 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:52:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-04-06 09:52:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 181. [2022-04-06 09:52:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:52:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:52:55,900 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:52:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:52:55,900 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:52:55,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 66 states have internal predecessors, (115), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:52:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:52:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:52:55,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:52:55,900 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:52:55,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-04-06 09:52:56,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:56,117 INFO L403 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:52:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:52:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash 84124682, now seen corresponding path program 117 times [2022-04-06 09:52:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:52:56,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358965597] [2022-04-06 09:52:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:52:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:52:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:52:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:52:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:52:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:52:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:52:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:52:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:52:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:52:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:52:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:52:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:52:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:52:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:52:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:52:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:52:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:52:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:52:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:52:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 378 proven. 134 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:56,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:52:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358965597] [2022-04-06 09:52:56,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358965597] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:52:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731411420] [2022-04-06 09:52:56,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:52:56,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:52:56,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:52:56,483 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:52:56,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-04-06 09:52:56,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-04-06 09:52:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:52:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:52:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:52:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:57,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:52:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 424 proven. 88 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:52:57,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731411420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:52:57,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:52:57,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 66 [2022-04-06 09:52:57,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746980248] [2022-04-06 09:52:57,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:52:57,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 09:52:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:52:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 09:52:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3539, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 09:52:57,517 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 66 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 65 states have internal predecessors, (114), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:53:07,437 INFO L93 Difference]: Finished difference Result 1045 states and 1314 transitions. [2022-04-06 09:53:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 09:53:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 65 states have internal predecessors, (114), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:53:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:53:07,439 INFO L225 Difference]: With dead ends: 1045 [2022-04-06 09:53:07,439 INFO L226 Difference]: Without dead ends: 986 [2022-04-06 09:53:07,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11534 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5266, Invalid=25184, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 09:53:07,440 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:53:07,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 113 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:53:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-04-06 09:53:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 181. [2022-04-06 09:53:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:53:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:53:08,191 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:53:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:53:08,191 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:53:08,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.7272727272727273) internal successors, (114), 65 states have internal predecessors, (114), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:53:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:53:08,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:53:08,192 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:53:08,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-04-06 09:53:08,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-04-06 09:53:08,408 INFO L403 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:53:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:53:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -361478262, now seen corresponding path program 118 times [2022-04-06 09:53:08,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:53:08,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151194733] [2022-04-06 09:53:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:53:08,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:53:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:53:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:53:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:53:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:53:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:53:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:53:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:53:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:53:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:53:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:53:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:53:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:53:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:53:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:53:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:53:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:53:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:53:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 378 proven. 143 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:08,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:53:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151194733] [2022-04-06 09:53:08,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151194733] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:53:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039265291] [2022-04-06 09:53:08,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:53:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:53:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:53:08,856 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:53:08,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-04-06 09:53:08,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:53:08,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:53:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:53:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:53:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:09,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:53:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 424 proven. 97 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:10,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039265291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:53:10,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:53:10,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 65 [2022-04-06 09:53:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657114643] [2022-04-06 09:53:10,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:53:10,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 09:53:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:53:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 09:53:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=3413, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 09:53:10,073 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 64 states have internal predecessors, (113), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:53:19,814 INFO L93 Difference]: Finished difference Result 1100 states and 1387 transitions. [2022-04-06 09:53:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 09:53:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 64 states have internal predecessors, (113), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:53:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:53:19,816 INFO L225 Difference]: With dead ends: 1100 [2022-04-06 09:53:19,816 INFO L226 Difference]: Without dead ends: 1041 [2022-04-06 09:53:19,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10428 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4780, Invalid=22942, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 09:53:19,817 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 334 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:53:19,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 94 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:53:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-04-06 09:53:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 181. [2022-04-06 09:53:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:53:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:53:20,583 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:53:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:53:20,584 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:53:20,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 64 states have internal predecessors, (113), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:53:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:53:20,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:53:20,584 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:53:20,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-04-06 09:53:20,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-04-06 09:53:20,800 INFO L403 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:53:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:53:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 178336778, now seen corresponding path program 119 times [2022-04-06 09:53:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:53:20,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061319990] [2022-04-06 09:53:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:53:20,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:53:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:53:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:53:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:53:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:53:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:53:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:53:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:53:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:53:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:53:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:53:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:53:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:53:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:53:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:53:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:53:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:53:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:53:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 378 proven. 154 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:21,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:53:21,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061319990] [2022-04-06 09:53:21,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061319990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:53:21,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108055550] [2022-04-06 09:53:21,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:53:21,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:53:21,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:53:21,164 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:53:21,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-04-06 09:53:21,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-04-06 09:53:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:53:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:53:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:53:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:21,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:53:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 424 proven. 108 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:22,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108055550] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:53:22,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:53:22,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 64 [2022-04-06 09:53:22,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317246530] [2022-04-06 09:53:22,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:53:22,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 09:53:22,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:53:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 09:53:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=3285, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 09:53:22,158 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 64 states, 64 states have (on average 1.75) internal successors, (112), 63 states have internal predecessors, (112), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:53:32,238 INFO L93 Difference]: Finished difference Result 1154 states and 1459 transitions. [2022-04-06 09:53:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 09:53:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 63 states have internal predecessors, (112), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:53:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:53:32,240 INFO L225 Difference]: With dead ends: 1154 [2022-04-06 09:53:32,240 INFO L226 Difference]: Without dead ends: 1095 [2022-04-06 09:53:32,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9071 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4217, Invalid=20275, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 09:53:32,242 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 443 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:53:32,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 119 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:53:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-04-06 09:53:33,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 181. [2022-04-06 09:53:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:53:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:53:33,024 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:53:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:53:33,024 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:53:33,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 63 states have internal predecessors, (112), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:53:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:53:33,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:53:33,024 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:53:33,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-04-06 09:53:33,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-04-06 09:53:33,241 INFO L403 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:53:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:53:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -219891830, now seen corresponding path program 120 times [2022-04-06 09:53:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:53:33,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798353994] [2022-04-06 09:53:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:53:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:53:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:53:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:53:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:53:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:53:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:53:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:53:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:53:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:53:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:53:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:53:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:53:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:53:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:53:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:53:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:53:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:53:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:53:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 378 proven. 167 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:53:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798353994] [2022-04-06 09:53:33,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798353994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:53:33,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025473252] [2022-04-06 09:53:33,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:53:33,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:53:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:53:33,684 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:53:33,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-04-06 09:53:33,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-04-06 09:53:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:53:33,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:53:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:53:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:34,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:53:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 424 proven. 121 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:34,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025473252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:53:34,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:53:34,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 63 [2022-04-06 09:53:34,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945669197] [2022-04-06 09:53:34,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:53:34,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 09:53:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:53:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 09:53:34,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3155, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 09:53:34,600 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:53:44,424 INFO L93 Difference]: Finished difference Result 1207 states and 1530 transitions. [2022-04-06 09:53:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 09:53:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:53:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:53:44,426 INFO L225 Difference]: With dead ends: 1207 [2022-04-06 09:53:44,426 INFO L226 Difference]: Without dead ends: 1148 [2022-04-06 09:53:44,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7470 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3607, Invalid=17273, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 09:53:44,427 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 372 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:53:44,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 120 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:53:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-04-06 09:53:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 181. [2022-04-06 09:53:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.132867132867133) internal successors, (162), 144 states have internal predecessors, (162), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:53:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-04-06 09:53:45,273 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 145 [2022-04-06 09:53:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:53:45,273 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-04-06 09:53:45,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.7619047619047619) internal successors, (111), 62 states have internal predecessors, (111), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-04-06 09:53:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 09:53:45,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:53:45,274 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:53:45,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-04-06 09:53:45,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-04-06 09:53:45,487 INFO L403 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:53:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:53:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash -94190582, now seen corresponding path program 16 times [2022-04-06 09:53:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:53:45,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355393496] [2022-04-06 09:53:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:53:45,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:53:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:53:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:53:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 09:53:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:53:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 09:53:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 09:53:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 09:53:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 09:53:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 09:53:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 09:53:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 09:53:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 09:53:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 09:53:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 09:53:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 09:53:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 09:53:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 09:53:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:53:45,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355393496] [2022-04-06 09:53:45,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355393496] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:53:45,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134954491] [2022-04-06 09:53:45,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:53:45,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:53:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:53:45,858 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:53:45,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-04-06 09:53:45,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:53:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:53:45,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 09:53:45,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:53:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:46,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:53:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:46,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134954491] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:53:46,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:53:46,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 62 [2022-04-06 09:53:46,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929245255] [2022-04-06 09:53:46,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:53:46,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 09:53:46,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:53:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 09:53:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=3023, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 09:53:46,769 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 62 states, 62 states have (on average 1.7741935483870968) internal successors, (110), 61 states have internal predecessors, (110), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:53:56,623 INFO L93 Difference]: Finished difference Result 1262 states and 1604 transitions. [2022-04-06 09:53:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 09:53:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7741935483870968) internal successors, (110), 61 states have internal predecessors, (110), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 145 [2022-04-06 09:53:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:53:56,625 INFO L225 Difference]: With dead ends: 1262 [2022-04-06 09:53:56,625 INFO L226 Difference]: Without dead ends: 1203 [2022-04-06 09:53:56,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5741 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3004, Invalid=14026, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 09:53:56,626 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 543 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:53:56,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 94 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:53:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2022-04-06 09:53:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 183. [2022-04-06 09:53:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 146 states have internal predecessors, (165), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:53:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 202 transitions. [2022-04-06 09:53:57,427 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 202 transitions. Word has length 145 [2022-04-06 09:53:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:53:57,427 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 202 transitions. [2022-04-06 09:53:57,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7741935483870968) internal successors, (110), 61 states have internal predecessors, (110), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 09:53:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 202 transitions. [2022-04-06 09:53:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 09:53:57,427 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:53:57,427 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:53:57,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-04-06 09:53:57,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-04-06 09:53:57,643 INFO L403 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:53:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:53:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash -606675478, now seen corresponding path program 32 times [2022-04-06 09:53:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:53:57,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053172327] [2022-04-06 09:53:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:53:57,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:53:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:53:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:53:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:53:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:53:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:53:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:53:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:53:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:53:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:53:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:53:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:53:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:53:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:53:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:53:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:53:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:53:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:53:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:53:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 168 proven. 409 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:53:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053172327] [2022-04-06 09:53:57,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053172327] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:53:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759237324] [2022-04-06 09:53:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:53:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:53:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:53:57,813 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:53:57,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-04-06 09:53:57,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:53:57,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:53:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 09:53:57,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:53:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 185 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:58,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:53:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 185 proven. 392 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 09:53:58,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759237324] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:53:58,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:53:58,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 26 [2022-04-06 09:53:58,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115400328] [2022-04-06 09:53:58,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:53:58,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 09:53:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:53:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 09:53:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2022-04-06 09:53:58,192 INFO L87 Difference]: Start difference. First operand 183 states and 202 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:53:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:53:59,416 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-04-06 09:53:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 09:53:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 146 [2022-04-06 09:53:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:53:59,417 INFO L225 Difference]: With dead ends: 196 [2022-04-06 09:53:59,417 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 09:53:59,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=607, Invalid=1649, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 09:53:59,417 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:53:59,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 83 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:53:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 09:54:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2022-04-06 09:54:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 151 states have internal predecessors, (170), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:54:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 209 transitions. [2022-04-06 09:54:00,186 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 209 transitions. Word has length 146 [2022-04-06 09:54:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:00,186 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 209 transitions. [2022-04-06 09:54:00,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 09:54:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 209 transitions. [2022-04-06 09:54:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:54:00,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:00,187 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:00,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-04-06 09:54:00,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:00,402 INFO L403 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:00,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1541412014, now seen corresponding path program 33 times [2022-04-06 09:54:00,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:00,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845776624] [2022-04-06 09:54:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:00,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:54:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:54:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:54:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:54:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:54:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:54:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:54:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:54:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:54:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:54:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:54:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:54:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:54:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:54:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:54:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:54:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:54:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 427 proven. 202 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:00,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:00,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845776624] [2022-04-06 09:54:00,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845776624] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:00,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794178530] [2022-04-06 09:54:00,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:54:00,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:00,887 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:00,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-04-06 09:54:00,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-04-06 09:54:00,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:54:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:54:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:54:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 476 proven. 153 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:01,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:54:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 476 proven. 153 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:02,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794178530] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:54:02,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:54:02,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 09:54:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356502604] [2022-04-06 09:54:02,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:54:02,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 09:54:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 09:54:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=5413, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 09:54:02,054 INFO L87 Difference]: Start difference. First operand 190 states and 209 transitions. Second operand has 82 states, 82 states have (on average 1.6097560975609757) internal successors, (132), 81 states have internal predecessors, (132), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:54:04,466 INFO L93 Difference]: Finished difference Result 324 states and 380 transitions. [2022-04-06 09:54:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 09:54:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.6097560975609757) internal successors, (132), 81 states have internal predecessors, (132), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:54:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:54:04,467 INFO L225 Difference]: With dead ends: 324 [2022-04-06 09:54:04,467 INFO L226 Difference]: Without dead ends: 262 [2022-04-06 09:54:04,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2625, Invalid=11895, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 09:54:04,468 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:54:04,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 84 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:54:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-04-06 09:54:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 191. [2022-04-06 09:54:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:54:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:54:05,306 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:54:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:05,306 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:54:05,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.6097560975609757) internal successors, (132), 81 states have internal predecessors, (132), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:54:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:54:05,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:05,307 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:05,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-04-06 09:54:05,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:05,523 INFO L403 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -635701202, now seen corresponding path program 121 times [2022-04-06 09:54:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004533989] [2022-04-06 09:54:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:54:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:54:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:54:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:54:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:54:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:54:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:54:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:54:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:54:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:54:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:54:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:54:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:54:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:54:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:54:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:54:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:54:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 427 proven. 186 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:05,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:05,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004533989] [2022-04-06 09:54:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004533989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609627890] [2022-04-06 09:54:05,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:54:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:05,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:05,825 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:05,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-04-06 09:54:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:54:05,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:54:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 476 proven. 137 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:06,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:54:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 476 proven. 137 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:06,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609627890] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:54:06,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:54:06,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 81 [2022-04-06 09:54:06,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820259813] [2022-04-06 09:54:06,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:54:06,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 09:54:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 09:54:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=5306, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 09:54:06,806 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 81 states, 81 states have (on average 1.617283950617284) internal successors, (131), 80 states have internal predecessors, (131), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:54:10,519 INFO L93 Difference]: Finished difference Result 395 states and 470 transitions. [2022-04-06 09:54:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 09:54:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.617283950617284) internal successors, (131), 80 states have internal predecessors, (131), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:54:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:54:10,520 INFO L225 Difference]: With dead ends: 395 [2022-04-06 09:54:10,520 INFO L226 Difference]: Without dead ends: 333 [2022-04-06 09:54:10,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3271, Invalid=15635, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 09:54:10,521 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:54:10,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 93 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:54:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-04-06 09:54:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 191. [2022-04-06 09:54:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:54:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:54:11,395 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:54:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:11,395 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:54:11,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.617283950617284) internal successors, (131), 80 states have internal predecessors, (131), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:54:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:54:11,395 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:11,395 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:11,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-04-06 09:54:11,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-04-06 09:54:11,599 INFO L403 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2065015982, now seen corresponding path program 122 times [2022-04-06 09:54:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:11,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883538613] [2022-04-06 09:54:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:54:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:54:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:54:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:54:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:54:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:54:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:54:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:54:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:54:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:54:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:54:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:54:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:54:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:54:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:54:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:54:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:54:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 427 proven. 172 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:12,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:12,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883538613] [2022-04-06 09:54:12,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883538613] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:12,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583572517] [2022-04-06 09:54:12,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:54:12,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:12,090 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:12,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-04-06 09:54:12,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:54:12,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:54:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:54:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:54:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 476 proven. 123 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:13,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:54:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 476 proven. 123 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:13,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583572517] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:54:13,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:54:13,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 80 [2022-04-06 09:54:13,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600893000] [2022-04-06 09:54:13,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:54:13,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 09:54:13,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 09:54:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=5197, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 09:54:13,633 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 80 states, 80 states have (on average 1.625) internal successors, (130), 79 states have internal predecessors, (130), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:54:18,859 INFO L93 Difference]: Finished difference Result 465 states and 559 transitions. [2022-04-06 09:54:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 09:54:18,860 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.625) internal successors, (130), 79 states have internal predecessors, (130), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:54:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:54:18,860 INFO L225 Difference]: With dead ends: 465 [2022-04-06 09:54:18,860 INFO L226 Difference]: Without dead ends: 403 [2022-04-06 09:54:18,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8128 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3978, Invalid=19278, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 09:54:18,862 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:54:18,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 133 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:54:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-04-06 09:54:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 191. [2022-04-06 09:54:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:54:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:54:19,746 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:54:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:19,746 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:54:19,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.625) internal successors, (130), 79 states have internal predecessors, (130), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:54:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:54:19,747 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:19,747 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:19,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-04-06 09:54:19,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:19,957 INFO L403 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash 905209902, now seen corresponding path program 123 times [2022-04-06 09:54:19,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:19,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109094350] [2022-04-06 09:54:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:19,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:54:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:54:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:54:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:54:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:54:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:54:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:54:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:54:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:54:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:54:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:54:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:54:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:54:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:54:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:54:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:54:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:54:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 427 proven. 160 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:20,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:20,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109094350] [2022-04-06 09:54:20,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109094350] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:20,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130274074] [2022-04-06 09:54:20,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:54:20,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:20,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:20,464 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:20,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-04-06 09:54:20,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-04-06 09:54:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:54:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:54:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:54:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 476 proven. 111 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:21,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:54:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 476 proven. 111 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:21,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130274074] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:54:21,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:54:21,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 79 [2022-04-06 09:54:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473877191] [2022-04-06 09:54:21,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:54:21,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 09:54:21,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 09:54:21,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1076, Invalid=5086, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 09:54:21,994 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 79 states, 79 states have (on average 1.6329113924050633) internal successors, (129), 78 states have internal predecessors, (129), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:54:28,440 INFO L93 Difference]: Finished difference Result 534 states and 647 transitions. [2022-04-06 09:54:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 09:54:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.6329113924050633) internal successors, (129), 78 states have internal predecessors, (129), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:54:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:54:28,456 INFO L225 Difference]: With dead ends: 534 [2022-04-06 09:54:28,456 INFO L226 Difference]: Without dead ends: 472 [2022-04-06 09:54:28,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4682, Invalid=22708, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 09:54:28,457 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 121 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:54:28,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 105 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:54:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-04-06 09:54:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 191. [2022-04-06 09:54:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:54:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:54:29,449 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:54:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:29,449 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:54:29,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.6329113924050633) internal successors, (129), 78 states have internal predecessors, (129), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:54:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:54:29,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:29,449 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:29,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-04-06 09:54:29,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:29,666 INFO L403 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash 175060142, now seen corresponding path program 124 times [2022-04-06 09:54:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:29,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724733198] [2022-04-06 09:54:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:29,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:54:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:54:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:54:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:54:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:54:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:54:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:54:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:54:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:54:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:54:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:54:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:54:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:54:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:54:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:54:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:54:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:54:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 427 proven. 150 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:30,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:30,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724733198] [2022-04-06 09:54:30,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724733198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:30,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197643980] [2022-04-06 09:54:30,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:54:30,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:30,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:30,058 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-04-06 09:54:30,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:54:30,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:54:30,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:54:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:54:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 476 proven. 101 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:30,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:54:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 476 proven. 101 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:31,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197643980] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:54:31,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:54:31,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 78 [2022-04-06 09:54:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002987863] [2022-04-06 09:54:31,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:54:31,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 09:54:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 09:54:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=4973, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 09:54:31,096 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 78 states, 78 states have (on average 1.641025641025641) internal successors, (128), 77 states have internal predecessors, (128), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:54:38,163 INFO L93 Difference]: Finished difference Result 602 states and 734 transitions. [2022-04-06 09:54:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 09:54:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.641025641025641) internal successors, (128), 77 states have internal predecessors, (128), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:54:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:54:38,164 INFO L225 Difference]: With dead ends: 602 [2022-04-06 09:54:38,164 INFO L226 Difference]: Without dead ends: 540 [2022-04-06 09:54:38,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11234 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5344, Invalid=25808, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 09:54:38,166 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:54:38,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 125 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:54:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-04-06 09:54:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 191. [2022-04-06 09:54:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:54:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:54:39,157 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:54:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:39,157 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:54:39,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.641025641025641) internal successors, (128), 77 states have internal predecessors, (128), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:54:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:54:39,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:39,158 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:39,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-04-06 09:54:39,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-04-06 09:54:39,371 INFO L403 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1926703058, now seen corresponding path program 125 times [2022-04-06 09:54:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:39,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135548453] [2022-04-06 09:54:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:54:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:54:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:54:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:54:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:54:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:54:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:54:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:54:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:54:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:54:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:54:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:54:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:54:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:54:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:54:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:54:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:54:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 427 proven. 142 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135548453] [2022-04-06 09:54:39,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135548453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608766048] [2022-04-06 09:54:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:54:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:39,818 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:39,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-04-06 09:54:39,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-04-06 09:54:39,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:54:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:54:39,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:54:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 476 proven. 93 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:40,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:54:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 476 proven. 93 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:40,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608766048] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:54:40,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:54:40,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 77 [2022-04-06 09:54:40,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625776554] [2022-04-06 09:54:40,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:54:40,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 09:54:40,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 09:54:40,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=4858, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 09:54:40,729 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 77 states, 77 states have (on average 1.6493506493506493) internal successors, (127), 76 states have internal predecessors, (127), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:54:49,169 INFO L93 Difference]: Finished difference Result 669 states and 820 transitions. [2022-04-06 09:54:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 09:54:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6493506493506493) internal successors, (127), 76 states have internal predecessors, (127), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:54:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:54:49,171 INFO L225 Difference]: With dead ends: 669 [2022-04-06 09:54:49,171 INFO L226 Difference]: Without dead ends: 607 [2022-04-06 09:54:49,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12576 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5931, Invalid=28479, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 09:54:49,172 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:54:49,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 134 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:54:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-04-06 09:54:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 191. [2022-04-06 09:54:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:54:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:54:50,106 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:54:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:54:50,106 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:54:50,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6493506493506493) internal successors, (127), 76 states have internal predecessors, (127), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:54:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:54:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:54:50,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:54:50,107 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:54:50,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-04-06 09:54:50,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:50,323 INFO L403 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:54:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:54:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1024670546, now seen corresponding path program 126 times [2022-04-06 09:54:50,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:54:50,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289173424] [2022-04-06 09:54:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:54:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:54:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:54:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:54:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:54:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:54:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:54:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:54:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:54:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:54:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:54:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:54:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:54:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:54:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:54:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:54:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:54:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:54:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:54:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:54:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:54:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 427 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:50,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:54:50,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289173424] [2022-04-06 09:54:50,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289173424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:54:50,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165233470] [2022-04-06 09:54:50,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:54:50,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:54:50,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:54:50,712 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:54:50,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-04-06 09:54:50,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 09:54:50,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:54:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:54:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:54:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 476 proven. 87 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:51,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:54:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 476 proven. 87 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:54:51,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165233470] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:54:51,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:54:51,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 76 [2022-04-06 09:54:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341358279] [2022-04-06 09:54:51,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:54:51,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 09:54:51,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:54:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 09:54:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=4741, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 09:54:51,905 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 76 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 75 states have internal predecessors, (126), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:55:01,032 INFO L93 Difference]: Finished difference Result 735 states and 905 transitions. [2022-04-06 09:55:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 09:55:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 75 states have internal predecessors, (126), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:55:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:55:01,033 INFO L225 Difference]: With dead ends: 735 [2022-04-06 09:55:01,033 INFO L226 Difference]: Without dead ends: 673 [2022-04-06 09:55:01,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13700 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6416, Invalid=30640, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 09:55:01,035 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 218 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:55:01,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 84 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:55:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-04-06 09:55:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 191. [2022-04-06 09:55:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:55:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:55:01,972 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:55:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:55:01,972 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:55:01,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 75 states have internal predecessors, (126), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:55:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:55:01,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:55:01,973 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:55:01,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-04-06 09:55:02,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:02,189 INFO L403 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:55:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:55:02,189 INFO L85 PathProgramCache]: Analyzing trace with hash 112805934, now seen corresponding path program 127 times [2022-04-06 09:55:02,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:55:02,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862293603] [2022-04-06 09:55:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:55:02,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:55:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:55:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:55:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:55:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:55:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:55:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:55:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:55:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:55:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:55:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:55:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:55:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:55:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:55:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:55:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:55:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:55:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:55:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:55:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 427 proven. 132 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:02,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:55:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862293603] [2022-04-06 09:55:02,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862293603] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:55:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85165625] [2022-04-06 09:55:02,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:55:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:55:02,656 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:55:02,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-04-06 09:55:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:55:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:55:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 476 proven. 83 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:03,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:55:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 476 proven. 83 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:04,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85165625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:55:04,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:55:04,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 75 [2022-04-06 09:55:04,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728902818] [2022-04-06 09:55:04,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:55:04,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 09:55:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:55:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 09:55:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=928, Invalid=4622, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 09:55:04,103 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:55:14,031 INFO L93 Difference]: Finished difference Result 800 states and 989 transitions. [2022-04-06 09:55:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-04-06 09:55:14,032 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:55:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:55:14,033 INFO L225 Difference]: With dead ends: 800 [2022-04-06 09:55:14,033 INFO L226 Difference]: Without dead ends: 738 [2022-04-06 09:55:14,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14563 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6778, Invalid=32228, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 09:55:14,035 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 216 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:55:14,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 84 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:55:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-04-06 09:55:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 191. [2022-04-06 09:55:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:55:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:55:14,983 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:55:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:55:14,983 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:55:14,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:55:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:55:14,984 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:55:14,984 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:55:15,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-04-06 09:55:15,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:15,199 INFO L403 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:55:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:55:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1651616594, now seen corresponding path program 128 times [2022-04-06 09:55:15,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:55:15,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500716533] [2022-04-06 09:55:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:55:15,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:55:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:55:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:55:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:55:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:55:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:55:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:55:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:55:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:55:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:55:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:55:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:55:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:55:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:55:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:55:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:55:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:55:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:55:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:55:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 427 proven. 130 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:15,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:55:15,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500716533] [2022-04-06 09:55:15,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500716533] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:55:15,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893593660] [2022-04-06 09:55:15,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:55:15,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:55:15,660 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:55:15,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-04-06 09:55:15,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:55:15,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:55:15,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:55:15,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:55:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 476 proven. 81 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:16,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:55:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 476 proven. 81 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:16,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893593660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:55:16,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:55:16,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 74 [2022-04-06 09:55:16,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691645787] [2022-04-06 09:55:16,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:55:16,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 09:55:16,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:55:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 09:55:16,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 09:55:16,845 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 74 states, 74 states have (on average 1.6756756756756757) internal successors, (124), 73 states have internal predecessors, (124), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:55:27,496 INFO L93 Difference]: Finished difference Result 864 states and 1072 transitions. [2022-04-06 09:55:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-04-06 09:55:27,496 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.6756756756756757) internal successors, (124), 73 states have internal predecessors, (124), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:55:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:55:27,497 INFO L225 Difference]: With dead ends: 864 [2022-04-06 09:55:27,497 INFO L226 Difference]: Without dead ends: 802 [2022-04-06 09:55:27,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15134 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7002, Invalid=33198, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 09:55:27,499 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 197 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:55:27,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 118 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:55:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-04-06 09:55:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 191. [2022-04-06 09:55:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:55:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:55:28,461 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:55:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:55:28,461 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:55:28,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.6756756756756757) internal successors, (124), 73 states have internal predecessors, (124), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:55:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:55:28,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:55:28,461 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:55:28,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-04-06 09:55:28,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-04-06 09:55:28,667 INFO L403 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:55:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:55:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1985628114, now seen corresponding path program 129 times [2022-04-06 09:55:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:55:28,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125869004] [2022-04-06 09:55:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:55:28,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:55:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:55:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:55:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:55:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:55:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:55:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:55:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:55:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:55:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:55:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:55:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:55:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:55:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:55:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:55:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:55:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:55:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:55:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:55:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 427 proven. 130 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:55:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125869004] [2022-04-06 09:55:29,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125869004] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:55:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332157887] [2022-04-06 09:55:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:55:29,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:55:29,140 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:55:29,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-04-06 09:55:29,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-04-06 09:55:29,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:55:29,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:55:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:55:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 476 proven. 81 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:30,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:55:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 476 proven. 81 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:30,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332157887] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:55:30,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:55:30,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 73 [2022-04-06 09:55:30,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027244171] [2022-04-06 09:55:30,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:55:30,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 09:55:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:55:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 09:55:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=4378, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 09:55:30,531 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 73 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 72 states have internal predecessors, (123), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:55:41,748 INFO L93 Difference]: Finished difference Result 927 states and 1154 transitions. [2022-04-06 09:55:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-04-06 09:55:41,748 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 72 states have internal predecessors, (123), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:55:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:55:41,750 INFO L225 Difference]: With dead ends: 927 [2022-04-06 09:55:41,750 INFO L226 Difference]: Without dead ends: 865 [2022-04-06 09:55:41,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15394 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7079, Invalid=33523, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 09:55:41,752 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:55:41,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 119 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:55:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-04-06 09:55:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 191. [2022-04-06 09:55:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:55:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:55:42,707 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:55:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:55:42,707 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:55:42,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 72 states have internal predecessors, (123), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:55:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:55:42,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:55:42,707 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:55:42,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-04-06 09:55:42,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:42,923 INFO L403 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:55:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:55:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash -749476690, now seen corresponding path program 130 times [2022-04-06 09:55:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:55:42,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549837415] [2022-04-06 09:55:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:55:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:55:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:55:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:55:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:55:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:55:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:55:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:55:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:55:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:55:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:55:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:55:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:55:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:55:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:55:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:55:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:55:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:55:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:55:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:55:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 427 proven. 132 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:43,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:55:43,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549837415] [2022-04-06 09:55:43,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549837415] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:55:43,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999405243] [2022-04-06 09:55:43,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:55:43,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:43,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:55:43,384 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:55:43,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-04-06 09:55:43,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:55:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:55:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:55:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:55:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 476 proven. 83 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:44,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:55:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 476 proven. 83 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:44,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999405243] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:55:44,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:55:44,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 72 [2022-04-06 09:55:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062135702] [2022-04-06 09:55:44,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:55:44,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 09:55:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:55:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 09:55:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=4253, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 09:55:44,670 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 72 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 71 states have internal predecessors, (122), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:55:56,623 INFO L93 Difference]: Finished difference Result 989 states and 1235 transitions. [2022-04-06 09:55:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-04-06 09:55:56,623 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 71 states have internal predecessors, (122), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:55:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:55:56,625 INFO L225 Difference]: With dead ends: 989 [2022-04-06 09:55:56,625 INFO L226 Difference]: Without dead ends: 927 [2022-04-06 09:55:56,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15331 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7006, Invalid=33194, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 09:55:56,627 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 247 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 09:55:56,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 149 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 09:55:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-04-06 09:55:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 191. [2022-04-06 09:55:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:55:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:55:57,588 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:55:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:55:57,589 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:55:57,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 71 states have internal predecessors, (122), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:55:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:55:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:55:57,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:55:57,589 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:55:57,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-04-06 09:55:57,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:57,795 INFO L403 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:55:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:55:57,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1125242834, now seen corresponding path program 131 times [2022-04-06 09:55:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:55:57,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928069186] [2022-04-06 09:55:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:55:57,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:55:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:55:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:55:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:55:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:55:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:55:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:55:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:55:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:55:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:55:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:55:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:55:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:55:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:55:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:55:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:55:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:55:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:55:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:55:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:55:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 427 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:58,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:55:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928069186] [2022-04-06 09:55:58,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928069186] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:55:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683453986] [2022-04-06 09:55:58,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:55:58,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:55:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:55:58,193 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:55:58,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-04-06 09:55:58,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-04-06 09:55:58,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:55:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:55:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:55:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 476 proven. 87 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:59,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:55:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 476 proven. 87 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:55:59,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683453986] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:55:59,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:55:59,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 71 [2022-04-06 09:55:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890343617] [2022-04-06 09:55:59,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:55:59,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 09:55:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:55:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 09:55:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=4126, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 09:55:59,394 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 71 states, 71 states have (on average 1.704225352112676) internal successors, (121), 70 states have internal predecessors, (121), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:56:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:56:11,789 INFO L93 Difference]: Finished difference Result 1050 states and 1315 transitions. [2022-04-06 09:56:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-04-06 09:56:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.704225352112676) internal successors, (121), 70 states have internal predecessors, (121), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:56:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:56:11,791 INFO L225 Difference]: With dead ends: 1050 [2022-04-06 09:56:11,791 INFO L226 Difference]: Without dead ends: 988 [2022-04-06 09:56:11,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14935 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6786, Invalid=32220, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 09:56:11,793 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 336 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:56:11,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 121 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:56:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-04-06 09:56:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 191. [2022-04-06 09:56:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:56:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:56:12,900 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:56:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:56:12,900 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:56:12,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.704225352112676) internal successors, (121), 70 states have internal predecessors, (121), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:56:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:56:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:56:12,916 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:56:12,916 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:56:12,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-04-06 09:56:13,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-04-06 09:56:13,133 INFO L403 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:56:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:56:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash -583174994, now seen corresponding path program 132 times [2022-04-06 09:56:13,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:56:13,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587582666] [2022-04-06 09:56:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:56:13,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:56:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:56:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:56:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:56:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:56:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:56:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:56:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:56:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:56:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:56:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:56:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:56:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:56:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:56:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:56:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:56:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:56:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:56:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:56:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 427 proven. 142 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:56:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587582666] [2022-04-06 09:56:13,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587582666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:56:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968288087] [2022-04-06 09:56:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:56:13,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:56:13,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:56:13,527 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:56:13,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-04-06 09:56:13,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 09:56:13,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:56:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:56:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:56:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 476 proven. 93 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:14,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:56:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 476 proven. 93 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:14,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968288087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:56:14,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:56:14,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 70 [2022-04-06 09:56:14,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814335341] [2022-04-06 09:56:14,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:56:14,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 09:56:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:56:14,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 09:56:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=3997, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 09:56:14,817 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 69 states have internal predecessors, (120), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:56:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:56:27,653 INFO L93 Difference]: Finished difference Result 1110 states and 1394 transitions. [2022-04-06 09:56:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-04-06 09:56:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 69 states have internal predecessors, (120), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:56:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:56:27,655 INFO L225 Difference]: With dead ends: 1110 [2022-04-06 09:56:27,655 INFO L226 Difference]: Without dead ends: 1048 [2022-04-06 09:56:27,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14207 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6428, Invalid=30628, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 09:56:27,657 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 332 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 09:56:27,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 121 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 09:56:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-04-06 09:56:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 191. [2022-04-06 09:56:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:56:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:56:28,617 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:56:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:56:28,617 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:56:28,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 69 states have internal predecessors, (120), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:56:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:56:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:56:28,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:56:28,617 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:56:28,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-04-06 09:56:28,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:56:28,834 INFO L403 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:56:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:56:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash 127047726, now seen corresponding path program 133 times [2022-04-06 09:56:28,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:56:28,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551797178] [2022-04-06 09:56:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:56:28,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:56:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:56:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:56:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:56:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:56:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:56:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:56:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:56:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:56:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:56:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:56:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:56:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:56:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:56:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:56:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:56:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:56:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:56:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:56:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 427 proven. 150 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:29,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:56:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551797178] [2022-04-06 09:56:29,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551797178] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:56:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167576307] [2022-04-06 09:56:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:56:29,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:56:29,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:56:29,302 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:56:29,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-04-06 09:56:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:56:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:56:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 476 proven. 101 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:30,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:56:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 476 proven. 101 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:30,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167576307] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:56:30,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:56:30,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 69 [2022-04-06 09:56:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930940282] [2022-04-06 09:56:30,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:56:30,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 09:56:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:56:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 09:56:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=3866, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 09:56:30,321 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:56:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:56:43,396 INFO L93 Difference]: Finished difference Result 1169 states and 1472 transitions. [2022-04-06 09:56:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 09:56:43,397 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:56:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:56:43,399 INFO L225 Difference]: With dead ends: 1169 [2022-04-06 09:56:43,399 INFO L226 Difference]: Without dead ends: 1107 [2022-04-06 09:56:43,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13160 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5947, Invalid=28463, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 09:56:43,400 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 334 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:56:43,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 106 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:56:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-04-06 09:56:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 191. [2022-04-06 09:56:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:56:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:56:44,581 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:56:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:56:44,581 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:56:44,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 68 states have internal predecessors, (119), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:56:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:56:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:56:44,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:56:44,582 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:56:44,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-04-06 09:56:44,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:56:44,794 INFO L403 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:56:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:56:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1951073454, now seen corresponding path program 134 times [2022-04-06 09:56:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:56:44,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282898431] [2022-04-06 09:56:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:56:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:56:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:56:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:56:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:56:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:56:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:56:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:56:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:56:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:56:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:56:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:56:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:56:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:56:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:56:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:56:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:56:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:56:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:56:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:56:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:56:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 427 proven. 160 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:45,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:56:45,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282898431] [2022-04-06 09:56:45,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282898431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:56:45,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370386554] [2022-04-06 09:56:45,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:56:45,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:56:45,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:56:45,261 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:56:45,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-04-06 09:56:45,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:56:45,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:56:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:56:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:56:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 476 proven. 111 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:45,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:56:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 476 proven. 111 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:56:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370386554] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:56:46,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:56:46,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 68 [2022-04-06 09:56:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442952526] [2022-04-06 09:56:46,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:56:46,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 09:56:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:56:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 09:56:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=3733, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 09:56:46,095 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 68 states, 68 states have (on average 1.7352941176470589) internal successors, (118), 67 states have internal predecessors, (118), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:56:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:56:59,088 INFO L93 Difference]: Finished difference Result 1227 states and 1549 transitions. [2022-04-06 09:56:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 09:56:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7352941176470589) internal successors, (118), 67 states have internal predecessors, (118), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:56:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:56:59,091 INFO L225 Difference]: With dead ends: 1227 [2022-04-06 09:56:59,091 INFO L226 Difference]: Without dead ends: 1165 [2022-04-06 09:56:59,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11819 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5364, Invalid=25788, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 09:56:59,092 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 381 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:56:59,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 119 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 09:56:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-04-06 09:57:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 191. [2022-04-06 09:57:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:57:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:57:00,056 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:57:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:57:00,056 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:57:00,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7352941176470589) internal successors, (118), 67 states have internal predecessors, (118), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:57:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:57:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:57:00,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:57:00,057 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:57:00,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-04-06 09:57:00,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:57:00,272 INFO L403 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:57:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:57:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1869412306, now seen corresponding path program 135 times [2022-04-06 09:57:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:57:00,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680797842] [2022-04-06 09:57:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:57:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:57:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:57:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:57:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:57:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:57:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:57:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:57:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:57:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:57:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:57:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:57:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:57:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:57:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:57:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:57:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:57:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:57:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:57:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:57:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 427 proven. 172 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:57:00,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:57:00,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680797842] [2022-04-06 09:57:00,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680797842] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:57:00,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802091206] [2022-04-06 09:57:00,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:57:00,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:57:00,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:57:00,765 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:57:00,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-04-06 09:57:00,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-04-06 09:57:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:57:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:57:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:57:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 476 proven. 123 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:57:01,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:57:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 476 proven. 123 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:57:01,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802091206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:57:01,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:57:01,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 67 [2022-04-06 09:57:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557844754] [2022-04-06 09:57:01,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:57:01,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 09:57:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:57:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 09:57:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=3598, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 09:57:01,980 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 67 states, 67 states have (on average 1.7462686567164178) internal successors, (117), 66 states have internal predecessors, (117), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:57:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:57:16,698 INFO L93 Difference]: Finished difference Result 1284 states and 1625 transitions. [2022-04-06 09:57:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 09:57:16,699 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.7462686567164178) internal successors, (117), 66 states have internal predecessors, (117), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 153 [2022-04-06 09:57:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:57:16,701 INFO L225 Difference]: With dead ends: 1284 [2022-04-06 09:57:16,701 INFO L226 Difference]: Without dead ends: 1222 [2022-04-06 09:57:16,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10221 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4706, Invalid=22684, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 09:57:16,704 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 456 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:57:16,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 92 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:57:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-04-06 09:57:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 191. [2022-04-06 09:57:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 152 states have internal predecessors, (171), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 09:57:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 210 transitions. [2022-04-06 09:57:17,892 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 210 transitions. Word has length 153 [2022-04-06 09:57:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:57:17,892 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 210 transitions. [2022-04-06 09:57:17,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.7462686567164178) internal successors, (117), 66 states have internal predecessors, (117), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 09:57:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 210 transitions. [2022-04-06 09:57:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 09:57:17,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:57:17,893 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:57:17,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-04-06 09:57:18,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:57:18,107 INFO L403 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:57:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:57:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1854106450, now seen corresponding path program 136 times [2022-04-06 09:57:18,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:57:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009802506] [2022-04-06 09:57:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:57:18,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:57:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:57:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 09:57:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:57:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 09:57:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 09:57:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:57:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 09:57:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 09:57:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 09:57:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 09:57:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 09:57:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 09:57:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 09:57:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 09:57:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 09:57:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 09:57:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 09:57:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 09:57:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:57:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 427 proven. 186 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:57:18,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:57:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009802506] [2022-04-06 09:57:18,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009802506] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:57:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725445143] [2022-04-06 09:57:18,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:57:18,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:57:18,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:57:18,595 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:57:18,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-04-06 09:57:18,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:57:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:57:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 09:57:18,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:57:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 476 proven. 137 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:57:19,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:57:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 476 proven. 137 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 09:57:19,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725445143] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:57:19,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:57:19,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 66 [2022-04-06 09:57:19,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920050295] [2022-04-06 09:57:19,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:57:19,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 09:57:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:57:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 09:57:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=3461, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 09:57:19,582 INFO L87 Difference]: Start difference. First operand 191 states and 210 transitions. Second operand has 66 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 65 states have internal predecessors, (116), 37 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36)