/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/half_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:19:49,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:19:49,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:19:49,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 05:19:49,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 05:19:49,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 05:19:49,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 05:19:49,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 05:19:49,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 05:19:49,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 05:19:49,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 05:19:49,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 05:19:49,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:19:49,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:19:49,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:19:49,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:19:49,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:19:49,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:19:49,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:19:49,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:19:49,328 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:19:49,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:19:49,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:19:49,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:19:49,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:19:49,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:19:49,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:19:49,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:19:49,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:19:49,348 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:19:49,371 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:19:49,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:19:49,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:19:49,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:19:49,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:19:49,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:19:49,373 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:19:49,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:19:49,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:19:49,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:19:49,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:19:49,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:19:49,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:19:49,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:19:49,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:19:49,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:19:49,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:19:49,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:19:49,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:19:49,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:19:49,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:19:49,378 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:19:49,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:19:49,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:19:49,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:19:49,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:19:49,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:19:49,609 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:19:49,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/half_2.i [2022-04-05 05:19:49,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13581dc87/c91fadb77bee4e84b2ef9936355d6b90/FLAGd935880d3 [2022-04-05 05:19:49,967 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:19:49,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i [2022-04-05 05:19:49,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13581dc87/c91fadb77bee4e84b2ef9936355d6b90/FLAGd935880d3 [2022-04-05 05:19:50,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13581dc87/c91fadb77bee4e84b2ef9936355d6b90 [2022-04-05 05:19:50,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:19:50,402 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:19:50,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:19:50,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:19:50,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:19:50,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f236a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50, skipping insertion in model container [2022-04-05 05:19:50,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:19:50,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:19:50,565 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/half_2.i[893,906] [2022-04-05 05:19:50,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:19:50,582 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:19:50,591 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/half_2.i[893,906] [2022-04-05 05:19:50,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:19:50,605 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:19:50,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50 WrapperNode [2022-04-05 05:19:50,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:19:50,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:19:50,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:19:50,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:19:50,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:19:50,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:19:50,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:19:50,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:19:50,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:19:50,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:50,662 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) [2022-04-05 05:19:50,681 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 [2022-04-05 05:19:50,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:19:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:19:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:19:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 05:19:50,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:19:50,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:19:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:19:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:19:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 05:19:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:19:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:19:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:19:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:19:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:19:50,790 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:19:50,792 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:19:50,889 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:19:50,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:19:50,894 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 05:19:50,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:19:50 BoogieIcfgContainer [2022-04-05 05:19:50,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:19:50,897 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:19:50,897 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:19:50,898 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:19:50,900 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:19:50" (1/1) ... [2022-04-05 05:19:50,902 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:19:50,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:19:50 BasicIcfg [2022-04-05 05:19:50,914 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:19:50,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:19:50,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:19:50,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:19:50,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:19:50" (1/4) ... [2022-04-05 05:19:50,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a827c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:19:50, skipping insertion in model container [2022-04-05 05:19:50,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:19:50" (2/4) ... [2022-04-05 05:19:50,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a827c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:19:50, skipping insertion in model container [2022-04-05 05:19:50,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:19:50" (3/4) ... [2022-04-05 05:19:50,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a827c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:19:50, skipping insertion in model container [2022-04-05 05:19:50,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:19:50" (4/4) ... [2022-04-05 05:19:50,921 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.iqvasr [2022-04-05 05:19:50,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:19:50,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:19:50,962 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:19:50,967 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 [2022-04-05 05:19:50,968 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:19:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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) [2022-04-05 05:19:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:19:50,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:50,991 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:50,992 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash 101012931, now seen corresponding path program 1 times [2022-04-05 05:19:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246731268] [2022-04-05 05:19:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:51,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:51,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:51,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246731268] [2022-04-05 05:19:51,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246731268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:19:51,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:19:51,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:19:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966958728] [2022-04-05 05:19:51,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:19:51,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:19:51,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:51,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:19:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:19:51,241 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-04-05 05:19:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:51,310 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-04-05 05:19:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:19:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-04-05 05:19:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:51,324 INFO L225 Difference]: With dead ends: 38 [2022-04-05 05:19:51,325 INFO L226 Difference]: Without dead ends: 18 [2022-04-05 05:19:51,327 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 [2022-04-05 05:19:51,329 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 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 [2022-04-05 05:19:51,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:19:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-05 05:19:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-05 05:19:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-04-05 05:19:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-05 05:19:51,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-04-05 05:19:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:51,363 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-05 05:19:51,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-04-05 05:19:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-05 05:19:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:19:51,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:51,365 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:51,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:19:51,366 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash 988516612, now seen corresponding path program 1 times [2022-04-05 05:19:51,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:51,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126984342] [2022-04-05 05:19:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:51,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:51,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:51,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126984342] [2022-04-05 05:19:51,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126984342] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:19:51,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:19:51,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-05 05:19:51,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546459368] [2022-04-05 05:19:51,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:19:51,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 05:19:51,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 05:19:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-05 05:19:51,535 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-04-05 05:19:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:51,681 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-05 05:19:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 05:19:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2022-04-05 05:19:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:51,682 INFO L225 Difference]: With dead ends: 29 [2022-04-05 05:19:51,682 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 05:19:51,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 05:19:51,686 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:19:51,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:19:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 05:19:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-05 05:19:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2022-04-05 05:19:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-05 05:19:51,692 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2022-04-05 05:19:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:51,692 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-05 05:19:51,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-04-05 05:19:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-05 05:19:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 05:19:51,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:51,693 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:51,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:19:51,693 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:51,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 459251866, now seen corresponding path program 1 times [2022-04-05 05:19:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978284455] [2022-04-05 05:19:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:51,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978284455] [2022-04-05 05:19:51,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978284455] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:19:51,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729005351] [2022-04-05 05:19:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:51,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:19:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:51,813 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) [2022-04-05 05:19:51,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:19:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:51,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 05:19:51,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:19:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:52,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:19:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:52,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729005351] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:19:52,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:19:52,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-05 05:19:52,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081988716] [2022-04-05 05:19:52,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:19:52,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 05:19:52,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 05:19:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:19:52,227 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:19:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:52,622 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-04-05 05:19:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 05:19:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 05:19:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:52,624 INFO L225 Difference]: With dead ends: 52 [2022-04-05 05:19:52,625 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 05:19:52,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-04-05 05:19:52,626 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:19:52,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 46 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:19:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 05:19:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2022-04-05 05:19:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 05:19:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-04-05 05:19:52,650 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 15 [2022-04-05 05:19:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:52,650 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-04-05 05:19:52,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:19:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-04-05 05:19:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 05:19:52,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:52,652 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:52,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:19:52,867 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 [2022-04-05 05:19:52,868 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash -585366054, now seen corresponding path program 2 times [2022-04-05 05:19:52,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301008089] [2022-04-05 05:19:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:52,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301008089] [2022-04-05 05:19:52,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301008089] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:19:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701879715] [2022-04-05 05:19:52,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:19:52,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:19:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:52,947 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) [2022-04-05 05:19:52,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:19:52,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:19:52,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:19:52,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 05:19:52,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:19:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:53,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:19:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:53,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701879715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:19:53,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:19:53,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-04-05 05:19:53,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435522750] [2022-04-05 05:19:53,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:19:53,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 05:19:53,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 05:19:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-05 05:19:53,151 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:19:53,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:53,504 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-04-05 05:19:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 05:19:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-05 05:19:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:53,506 INFO L225 Difference]: With dead ends: 68 [2022-04-05 05:19:53,506 INFO L226 Difference]: Without dead ends: 66 [2022-04-05 05:19:53,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-04-05 05:19:53,507 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:19:53,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 73 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:19:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-05 05:19:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2022-04-05 05:19:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 05:19:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-04-05 05:19:53,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 17 [2022-04-05 05:19:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:53,515 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-04-05 05:19:53,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:19:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-04-05 05:19:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 05:19:53,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:53,516 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:53,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:19:53,732 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 [2022-04-05 05:19:53,733 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:53,733 INFO L85 PathProgramCache]: Analyzing trace with hash 563219614, now seen corresponding path program 1 times [2022-04-05 05:19:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:53,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962857048] [2022-04-05 05:19:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:53,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:53,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-05 05:19:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:53,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962857048] [2022-04-05 05:19:53,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962857048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:19:53,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399512946] [2022-04-05 05:19:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:53,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:19:53,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:53,826 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) [2022-04-05 05:19:53,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:19:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:53,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:19:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:19:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:53,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 05:19:53,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399512946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:19:53,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 05:19:53,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-04-05 05:19:53,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550072596] [2022-04-05 05:19:53,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:19:53,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 05:19:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:53,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 05:19:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:19:53,910 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 05:19:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:53,948 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-04-05 05:19:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:19:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-04-05 05:19:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:53,949 INFO L225 Difference]: With dead ends: 49 [2022-04-05 05:19:53,949 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 05:19:53,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-04-05 05:19:53,950 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:19:53,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 52 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:19:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 05:19:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-05 05:19:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 05:19:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-04-05 05:19:53,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2022-04-05 05:19:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:53,959 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-04-05 05:19:53,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 05:19:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-04-05 05:19:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 05:19:53,960 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:53,960 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:53,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:19:54,179 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 [2022-04-05 05:19:54,180 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1254260258, now seen corresponding path program 1 times [2022-04-05 05:19:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:54,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426840162] [2022-04-05 05:19:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:54,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 05:19:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:54,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:54,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426840162] [2022-04-05 05:19:54,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426840162] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:19:54,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414850763] [2022-04-05 05:19:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:54,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:19:54,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:54,332 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) [2022-04-05 05:19:54,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:19:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:54,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 05:19:54,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:19:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:54,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:19:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:19:54,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414850763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:19:54,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:19:54,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-04-05 05:19:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7608987] [2022-04-05 05:19:54,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:19:54,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 05:19:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 05:19:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-04-05 05:19:54,722 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 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) [2022-04-05 05:19:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:55,324 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-04-05 05:19:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 05:19:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 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 23 [2022-04-05 05:19:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:55,325 INFO L225 Difference]: With dead ends: 70 [2022-04-05 05:19:55,325 INFO L226 Difference]: Without dead ends: 43 [2022-04-05 05:19:55,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 05:19:55,327 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:19:55,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 67 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:19:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-05 05:19:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-05 05:19:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 05:19:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-05 05:19:55,333 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 23 [2022-04-05 05:19:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:55,333 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-05 05:19:55,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 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) [2022-04-05 05:19:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-05 05:19:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 05:19:55,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:55,334 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:55,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:19:55,551 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 [2022-04-05 05:19:55,552 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash -638552550, now seen corresponding path program 2 times [2022-04-05 05:19:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508660442] [2022-04-05 05:19:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:55,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:55,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-05 05:19:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:55,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 05:19:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:19:55,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508660442] [2022-04-05 05:19:55,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508660442] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:19:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122537811] [2022-04-05 05:19:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:19:55,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:19:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:55,778 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) [2022-04-05 05:19:55,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:19:55,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:19:55,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:19:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 05:19:55,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:19:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:19:56,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:19:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:19:56,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122537811] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:19:56,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:19:56,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-04-05 05:19:56,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759097376] [2022-04-05 05:19:56,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:19:56,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-05 05:19:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-05 05:19:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-04-05 05:19:56,461 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 27 states have internal predecessors, (45), 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) [2022-04-05 05:19:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:57,246 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-04-05 05:19:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 05:19:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 27 states have internal predecessors, (45), 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 31 [2022-04-05 05:19:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:57,247 INFO L225 Difference]: With dead ends: 81 [2022-04-05 05:19:57,248 INFO L226 Difference]: Without dead ends: 62 [2022-04-05 05:19:57,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=401, Invalid=2461, Unknown=0, NotChecked=0, Total=2862 [2022-04-05 05:19:57,249 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:19:57,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 101 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:19:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-05 05:19:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-04-05 05:19:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 47 states have internal predecessors, (49), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 05:19:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-04-05 05:19:57,260 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 31 [2022-04-05 05:19:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:57,261 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-04-05 05:19:57,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 27 states have internal predecessors, (45), 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) [2022-04-05 05:19:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-04-05 05:19:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 05:19:57,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:57,262 INFO L499 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:57,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:19:57,475 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 [2022-04-05 05:19:57,476 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1063260006, now seen corresponding path program 3 times [2022-04-05 05:19:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:57,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324596618] [2022-04-05 05:19:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:57,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 05:19:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:57,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 05:19:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:19:57,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:57,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324596618] [2022-04-05 05:19:57,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324596618] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:19:57,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248357007] [2022-04-05 05:19:57,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:19:57,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:19:57,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:57,592 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) [2022-04-05 05:19:57,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:19:57,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 05:19:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:19:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 05:19:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:19:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:19:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:19:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:19:58,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248357007] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:19:58,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:19:58,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-04-05 05:19:58,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22675018] [2022-04-05 05:19:58,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:19:58,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-05 05:19:58,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-05 05:19:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 05:19:58,025 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 05:19:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:19:58,650 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-04-05 05:19:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 05:19:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-04-05 05:19:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:19:58,651 INFO L225 Difference]: With dead ends: 105 [2022-04-05 05:19:58,651 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 05:19:58,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2022-04-05 05:19:58,653 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 124 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:19:58,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 95 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:19:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 05:19:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2022-04-05 05:19:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 67 states have internal predecessors, (68), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 05:19:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2022-04-05 05:19:58,666 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 35 [2022-04-05 05:19:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:19:58,667 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2022-04-05 05:19:58,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 05:19:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2022-04-05 05:19:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 05:19:58,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:19:58,668 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:19:58,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-05 05:19:58,887 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 [2022-04-05 05:19:58,887 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:19:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:19:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1110470562, now seen corresponding path program 4 times [2022-04-05 05:19:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:19:58,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871365539] [2022-04-05 05:19:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:19:58,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:19:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:59,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:19:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:59,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-05 05:19:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:59,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 05:19:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:59,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 05:19:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:19:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 05:19:59,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:19:59,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871365539] [2022-04-05 05:19:59,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871365539] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:19:59,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80830059] [2022-04-05 05:19:59,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:19:59,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:19:59,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:19:59,117 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) [2022-04-05 05:19:59,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:19:59,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:19:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:19:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 05:19:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:19:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 05:19:59,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:19:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 05:19:59,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80830059] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:19:59,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:19:59,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-04-05 05:19:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374442801] [2022-04-05 05:19:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:19:59,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 05:19:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:19:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 05:19:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-04-05 05:19:59,858 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 29 states have internal predecessors, (50), 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) [2022-04-05 05:20:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:00,819 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2022-04-05 05:20:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 05:20:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 29 states have internal predecessors, (50), 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 39 [2022-04-05 05:20:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:00,820 INFO L225 Difference]: With dead ends: 137 [2022-04-05 05:20:00,820 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 05:20:00,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=503, Invalid=3037, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 05:20:00,822 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:00,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 77 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:20:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 05:20:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-04-05 05:20:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 75 states have internal predecessors, (77), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-05 05:20:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2022-04-05 05:20:00,836 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 39 [2022-04-05 05:20:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:00,836 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2022-04-05 05:20:00,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 29 states have internal predecessors, (50), 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) [2022-04-05 05:20:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2022-04-05 05:20:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 05:20:00,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:00,838 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:00,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:01,051 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 [2022-04-05 05:20:01,052 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1795894170, now seen corresponding path program 5 times [2022-04-05 05:20:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:01,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389214465] [2022-04-05 05:20:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:01,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:01,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 05:20:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:01,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 05:20:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:01,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 05:20:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:01,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 05:20:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 05:20:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389214465] [2022-04-05 05:20:01,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389214465] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080994682] [2022-04-05 05:20:01,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:20:01,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:01,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:01,353 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) [2022-04-05 05:20:01,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 05:20:01,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 05:20:01,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 05:20:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 05:20:01,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 05:20:02,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080994682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:02,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:02,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-04-05 05:20:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859000301] [2022-04-05 05:20:02,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:02,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 05:20:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 05:20:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 05:20:02,250 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 37 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 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) [2022-04-05 05:20:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:03,394 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-04-05 05:20:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 05:20:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 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 47 [2022-04-05 05:20:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:03,395 INFO L225 Difference]: With dead ends: 151 [2022-04-05 05:20:03,395 INFO L226 Difference]: Without dead ends: 114 [2022-04-05 05:20:03,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=651, Invalid=4041, Unknown=0, NotChecked=0, Total=4692 [2022-04-05 05:20:03,397 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 117 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:03,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 98 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:20:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-05 05:20:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-04-05 05:20:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 1.0875) internal successors, (87), 84 states have internal predecessors, (87), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-05 05:20:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2022-04-05 05:20:03,414 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 47 [2022-04-05 05:20:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:03,414 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2022-04-05 05:20:03,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 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) [2022-04-05 05:20:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2022-04-05 05:20:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 05:20:03,415 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:03,415 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:03,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:03,639 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 [2022-04-05 05:20:03,640 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash -665600290, now seen corresponding path program 6 times [2022-04-05 05:20:03,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041034197] [2022-04-05 05:20:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:03,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:03,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:03,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:20:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:03,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 05:20:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:03,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 05:20:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:03,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 05:20:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:03,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 05:20:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 05:20:03,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:03,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041034197] [2022-04-05 05:20:03,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041034197] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:03,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859429775] [2022-04-05 05:20:03,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:20:03,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:03,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:04,000 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) [2022-04-05 05:20:04,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 05:20:04,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-05 05:20:04,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 05:20:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 05:20:04,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 05:20:05,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859429775] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:05,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:05,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 48 [2022-04-05 05:20:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489063666] [2022-04-05 05:20:05,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:05,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-05 05:20:05,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-05 05:20:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-04-05 05:20:05,153 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 48 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 45 states have internal predecessors, (72), 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) [2022-04-05 05:20:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:06,292 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2022-04-05 05:20:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 05:20:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 45 states have internal predecessors, (72), 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 55 [2022-04-05 05:20:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:06,301 INFO L225 Difference]: With dead ends: 141 [2022-04-05 05:20:06,301 INFO L226 Difference]: Without dead ends: 97 [2022-04-05 05:20:06,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=630, Invalid=4920, Unknown=0, NotChecked=0, Total=5550 [2022-04-05 05:20:06,304 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:06,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 109 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:20:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-05 05:20:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-04-05 05:20:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-05 05:20:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-04-05 05:20:06,324 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 55 [2022-04-05 05:20:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:06,324 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-04-05 05:20:06,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 45 states have internal predecessors, (72), 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) [2022-04-05 05:20:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-04-05 05:20:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 05:20:06,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:06,326 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:06,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 05:20:06,551 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 [2022-04-05 05:20:06,551 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1662533350, now seen corresponding path program 7 times [2022-04-05 05:20:06,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:06,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056939549] [2022-04-05 05:20:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:06,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 05:20:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 05:20:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 05:20:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 05:20:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-05 05:20:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 05:20:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 05:20:06,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056939549] [2022-04-05 05:20:06,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056939549] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552871443] [2022-04-05 05:20:06,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:20:06,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:06,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:06,915 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) [2022-04-05 05:20:06,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 05:20:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:06,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 05:20:06,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 05:20:07,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 05:20:08,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552871443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:08,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:08,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 47 [2022-04-05 05:20:08,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109580451] [2022-04-05 05:20:08,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:08,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 05:20:08,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 05:20:08,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 05:20:08,073 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 44 states have internal predecessors, (74), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 05:20:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:09,905 INFO L93 Difference]: Finished difference Result 166 states and 195 transitions. [2022-04-05 05:20:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 05:20:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 44 states have internal predecessors, (74), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 63 [2022-04-05 05:20:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:09,906 INFO L225 Difference]: With dead ends: 166 [2022-04-05 05:20:09,906 INFO L226 Difference]: Without dead ends: 123 [2022-04-05 05:20:09,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1007, Invalid=6475, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 05:20:09,908 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 161 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:09,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 120 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 05:20:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-05 05:20:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-04-05 05:20:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 92 states have internal predecessors, (97), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (24), 20 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-05 05:20:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-04-05 05:20:09,927 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 63 [2022-04-05 05:20:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:09,927 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-04-05 05:20:09,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 44 states have internal predecessors, (74), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 05:20:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-04-05 05:20:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-05 05:20:09,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:09,928 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:09,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:10,130 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 [2022-04-05 05:20:10,131 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:10,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1752036002, now seen corresponding path program 8 times [2022-04-05 05:20:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:10,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546278964] [2022-04-05 05:20:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:10,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-05 05:20:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 05:20:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 05:20:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 05:20:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 05:20:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 05:20:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 05:20:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 65 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 05:20:10,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:10,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546278964] [2022-04-05 05:20:10,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546278964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:10,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649025605] [2022-04-05 05:20:10,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:20:10,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:10,575 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) [2022-04-05 05:20:10,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 05:20:10,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:20:10,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:10,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-05 05:20:10,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 05:20:11,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 05:20:12,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649025605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:12,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:12,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 52 [2022-04-05 05:20:12,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952002781] [2022-04-05 05:20:12,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:12,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-05 05:20:12,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-05 05:20:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2022-04-05 05:20:12,016 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 49 states have internal predecessors, (82), 23 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-05 05:20:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:14,276 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2022-04-05 05:20:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 05:20:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 49 states have internal predecessors, (82), 23 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 71 [2022-04-05 05:20:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:14,278 INFO L225 Difference]: With dead ends: 191 [2022-04-05 05:20:14,278 INFO L226 Difference]: Without dead ends: 141 [2022-04-05 05:20:14,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1215, Invalid=7905, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 05:20:14,282 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 180 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:14,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 141 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 05:20:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-05 05:20:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2022-04-05 05:20:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 100 states have (on average 1.1) internal successors, (110), 105 states have internal predecessors, (110), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-05 05:20:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2022-04-05 05:20:14,315 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 71 [2022-04-05 05:20:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:14,315 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2022-04-05 05:20:14,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 49 states have internal predecessors, (82), 23 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-05 05:20:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2022-04-05 05:20:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-05 05:20:14,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:14,317 INFO L499 BasicCegarLoop]: trace histogram [15, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:14,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:14,517 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 [2022-04-05 05:20:14,517 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 217151002, now seen corresponding path program 9 times [2022-04-05 05:20:14,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:14,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910706609] [2022-04-05 05:20:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 05:20:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 05:20:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 05:20:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 05:20:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 05:20:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 05:20:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 103 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 05:20:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910706609] [2022-04-05 05:20:14,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910706609] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166905856] [2022-04-05 05:20:14,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:20:14,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:14,790 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) [2022-04-05 05:20:14,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 05:20:14,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-04-05 05:20:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 05:20:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 12 proven. 177 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 05:20:15,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 12 proven. 177 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 05:20:15,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166905856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:15,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:15,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 66 [2022-04-05 05:20:15,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424656611] [2022-04-05 05:20:15,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:15,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-05 05:20:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-05 05:20:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=841, Invalid=3449, Unknown=0, NotChecked=0, Total=4290 [2022-04-05 05:20:15,859 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 63 states have internal predecessors, (90), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 05:20:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:17,481 INFO L93 Difference]: Finished difference Result 297 states and 376 transitions. [2022-04-05 05:20:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-05 05:20:17,482 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 63 states have internal predecessors, (90), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 71 [2022-04-05 05:20:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:17,484 INFO L225 Difference]: With dead ends: 297 [2022-04-05 05:20:17,484 INFO L226 Difference]: Without dead ends: 295 [2022-04-05 05:20:17,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2735, Invalid=9697, Unknown=0, NotChecked=0, Total=12432 [2022-04-05 05:20:17,486 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 304 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:17,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 126 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 05:20:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-04-05 05:20:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 272. [2022-04-05 05:20:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 189 states have (on average 1.052910052910053) internal successors, (199), 197 states have internal predecessors, (199), 73 states have call successors, (73), 10 states have call predecessors, (73), 9 states have return successors, (72), 64 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-05 05:20:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 344 transitions. [2022-04-05 05:20:17,539 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 344 transitions. Word has length 71 [2022-04-05 05:20:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:17,539 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 344 transitions. [2022-04-05 05:20:17,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 63 states have internal predecessors, (90), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 05:20:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 344 transitions. [2022-04-05 05:20:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 05:20:17,540 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:17,541 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:17,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:17,743 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 [2022-04-05 05:20:17,743 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash -71420262, now seen corresponding path program 10 times [2022-04-05 05:20:17,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:17,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444262759] [2022-04-05 05:20:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:17,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-05 05:20:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 05:20:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 05:20:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 05:20:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 05:20:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 05:20:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-05 05:20:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 05:20:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 05:20:18,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:18,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444262759] [2022-04-05 05:20:18,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444262759] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:18,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729573386] [2022-04-05 05:20:18,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:20:18,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:18,239 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) [2022-04-05 05:20:18,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 05:20:18,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:20:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 05:20:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 05:20:18,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 05:20:19,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729573386] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:19,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:19,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 57 [2022-04-05 05:20:19,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941849719] [2022-04-05 05:20:19,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:19,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-05 05:20:19,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:19,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-05 05:20:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2752, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 05:20:19,773 INFO L87 Difference]: Start difference. First operand 272 states and 344 transitions. Second operand has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 54 states have internal predecessors, (90), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 05:20:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:22,478 INFO L93 Difference]: Finished difference Result 359 states and 442 transitions. [2022-04-05 05:20:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-05 05:20:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 54 states have internal predecessors, (90), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 79 [2022-04-05 05:20:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:22,479 INFO L225 Difference]: With dead ends: 359 [2022-04-05 05:20:22,480 INFO L226 Difference]: Without dead ends: 302 [2022-04-05 05:20:22,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1443, Invalid=9477, Unknown=0, NotChecked=0, Total=10920 [2022-04-05 05:20:22,481 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:22,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 142 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 05:20:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-05 05:20:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2022-04-05 05:20:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 206 states have (on average 1.0533980582524272) internal successors, (217), 214 states have internal predecessors, (217), 79 states have call successors, (79), 11 states have call predecessors, (79), 10 states have return successors, (78), 70 states have call predecessors, (78), 78 states have call successors, (78) [2022-04-05 05:20:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 374 transitions. [2022-04-05 05:20:22,535 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 374 transitions. Word has length 79 [2022-04-05 05:20:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:22,535 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 374 transitions. [2022-04-05 05:20:22,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 54 states have internal predecessors, (90), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 05:20:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 374 transitions. [2022-04-05 05:20:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-05 05:20:22,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:22,537 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:22,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-05 05:20:22,751 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 [2022-04-05 05:20:22,751 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash 273841118, now seen corresponding path program 11 times [2022-04-05 05:20:22,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:22,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362940630] [2022-04-05 05:20:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 05:20:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 05:20:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 05:20:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 05:20:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 05:20:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 05:20:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 05:20:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-05 05:20:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 05:20:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 110 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 05:20:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:23,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362940630] [2022-04-05 05:20:23,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362940630] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:23,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661831828] [2022-04-05 05:20:23,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:20:23,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:23,280 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) [2022-04-05 05:20:23,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 05:20:23,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-04-05 05:20:23,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 05:20:23,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 05:20:23,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 05:20:25,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661831828] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:25,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:25,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 62 [2022-04-05 05:20:25,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871729979] [2022-04-05 05:20:25,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:25,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-05 05:20:25,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-05 05:20:25,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=3262, Unknown=0, NotChecked=0, Total=3782 [2022-04-05 05:20:25,082 INFO L87 Difference]: Start difference. First operand 296 states and 374 transitions. Second operand has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 59 states have internal predecessors, (98), 29 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-05 05:20:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:28,167 INFO L93 Difference]: Finished difference Result 382 states and 471 transitions. [2022-04-05 05:20:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-05 05:20:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 59 states have internal predecessors, (98), 29 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 87 [2022-04-05 05:20:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:28,173 INFO L225 Difference]: With dead ends: 382 [2022-04-05 05:20:28,173 INFO L226 Difference]: Without dead ends: 318 [2022-04-05 05:20:28,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1691, Invalid=11191, Unknown=0, NotChecked=0, Total=12882 [2022-04-05 05:20:28,175 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 219 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:28,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 153 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 05:20:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-04-05 05:20:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 313. [2022-04-05 05:20:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 218 states have (on average 1.055045871559633) internal successors, (230), 226 states have internal predecessors, (230), 84 states have call successors, (84), 11 states have call predecessors, (84), 10 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-05 05:20:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 397 transitions. [2022-04-05 05:20:28,254 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 397 transitions. Word has length 87 [2022-04-05 05:20:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:28,254 INFO L478 AbstractCegarLoop]: Abstraction has 313 states and 397 transitions. [2022-04-05 05:20:28,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 59 states have internal predecessors, (98), 29 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-05 05:20:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 397 transitions. [2022-04-05 05:20:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-05 05:20:28,256 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:28,256 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:28,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:28,472 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 [2022-04-05 05:20:28,473 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1371966490, now seen corresponding path program 12 times [2022-04-05 05:20:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:28,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641948258] [2022-04-05 05:20:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 05:20:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 05:20:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 05:20:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 05:20:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 05:20:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 05:20:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 05:20:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 05:20:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-05 05:20:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 05:20:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 137 proven. 104 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 05:20:29,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:29,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641948258] [2022-04-05 05:20:29,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641948258] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62593083] [2022-04-05 05:20:29,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:20:29,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:29,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:29,121 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) [2022-04-05 05:20:29,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 05:20:29,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-05 05:20:29,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 05:20:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 05:20:30,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 05:20:31,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62593083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:31,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:31,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 78 [2022-04-05 05:20:31,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043938393] [2022-04-05 05:20:31,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:31,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-05 05:20:31,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-05 05:20:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=5319, Unknown=0, NotChecked=0, Total=6006 [2022-04-05 05:20:31,621 INFO L87 Difference]: Start difference. First operand 313 states and 397 transitions. Second operand has 78 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 75 states have internal predecessors, (117), 32 states have call successors, (35), 4 states have call predecessors, (35), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 05:20:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:34,545 INFO L93 Difference]: Finished difference Result 350 states and 429 transitions. [2022-04-05 05:20:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-05 05:20:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 75 states have internal predecessors, (117), 32 states have call successors, (35), 4 states have call predecessors, (35), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 95 [2022-04-05 05:20:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:34,554 INFO L225 Difference]: With dead ends: 350 [2022-04-05 05:20:34,554 INFO L226 Difference]: Without dead ends: 283 [2022-04-05 05:20:34,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1535, Invalid=12745, Unknown=0, NotChecked=0, Total=14280 [2022-04-05 05:20:34,559 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:34,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 164 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 05:20:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-05 05:20:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-04-05 05:20:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 198 states have (on average 1.0555555555555556) internal successors, (209), 205 states have internal predecessors, (209), 74 states have call successors, (74), 11 states have call predecessors, (74), 10 states have return successors, (73), 66 states have call predecessors, (73), 73 states have call successors, (73) [2022-04-05 05:20:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 356 transitions. [2022-04-05 05:20:34,612 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 356 transitions. Word has length 95 [2022-04-05 05:20:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:34,612 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 356 transitions. [2022-04-05 05:20:34,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 75 states have internal predecessors, (117), 32 states have call successors, (35), 4 states have call predecessors, (35), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 05:20:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 356 transitions. [2022-04-05 05:20:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-05 05:20:34,613 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:34,613 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:34,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:34,816 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 [2022-04-05 05:20:34,816 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1499269726, now seen corresponding path program 13 times [2022-04-05 05:20:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:34,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003041867] [2022-04-05 05:20:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:34,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 05:20:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 05:20:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 05:20:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-05 05:20:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 05:20:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 05:20:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 05:20:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 05:20:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 05:20:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-05 05:20:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-05 05:20:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 167 proven. 120 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 05:20:35,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003041867] [2022-04-05 05:20:35,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003041867] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381542021] [2022-04-05 05:20:35,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:20:35,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:35,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:35,565 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) [2022-04-05 05:20:35,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 05:20:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-05 05:20:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 05:20:36,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 05:20:37,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381542021] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:37,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:37,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 72 [2022-04-05 05:20:37,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015102940] [2022-04-05 05:20:37,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:37,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-05 05:20:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-05 05:20:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=4411, Unknown=0, NotChecked=0, Total=5112 [2022-04-05 05:20:37,792 INFO L87 Difference]: Start difference. First operand 283 states and 356 transitions. Second operand has 72 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 69 states have internal predecessors, (114), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 05:20:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:42,104 INFO L93 Difference]: Finished difference Result 382 states and 470 transitions. [2022-04-05 05:20:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 05:20:42,104 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 69 states have internal predecessors, (114), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 103 [2022-04-05 05:20:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:42,106 INFO L225 Difference]: With dead ends: 382 [2022-04-05 05:20:42,106 INFO L226 Difference]: Without dead ends: 312 [2022-04-05 05:20:42,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 187 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4454 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2247, Invalid=15045, Unknown=0, NotChecked=0, Total=17292 [2022-04-05 05:20:42,107 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:42,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 190 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2736 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 05:20:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-05 05:20:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2022-04-05 05:20:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 217 states have (on average 1.064516129032258) internal successors, (231), 224 states have internal predecessors, (231), 80 states have call successors, (80), 12 states have call predecessors, (80), 11 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 05:20:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 390 transitions. [2022-04-05 05:20:42,168 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 390 transitions. Word has length 103 [2022-04-05 05:20:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:42,168 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 390 transitions. [2022-04-05 05:20:42,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 69 states have internal predecessors, (114), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 05:20:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 390 transitions. [2022-04-05 05:20:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-05 05:20:42,170 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:42,170 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:42,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:42,386 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 [2022-04-05 05:20:42,386 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:42,386 INFO L85 PathProgramCache]: Analyzing trace with hash 658031002, now seen corresponding path program 14 times [2022-04-05 05:20:42,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:42,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793582192] [2022-04-05 05:20:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:42,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 05:20:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 05:20:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 05:20:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 05:20:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-05 05:20:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 05:20:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 05:20:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 05:20:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 05:20:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-05 05:20:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-05 05:20:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-05 05:20:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 200 proven. 137 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 05:20:43,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:43,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793582192] [2022-04-05 05:20:43,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793582192] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:43,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410673049] [2022-04-05 05:20:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:20:43,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:43,129 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) [2022-04-05 05:20:43,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 05:20:43,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:20:43,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-05 05:20:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 05:20:44,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 05:20:46,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410673049] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:46,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:46,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 90 [2022-04-05 05:20:46,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527375000] [2022-04-05 05:20:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:46,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-05 05:20:46,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-05 05:20:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=6988, Unknown=0, NotChecked=0, Total=8010 [2022-04-05 05:20:46,174 INFO L87 Difference]: Start difference. First operand 309 states and 390 transitions. Second operand has 90 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 87 states have internal predecessors, (135), 38 states have call successors, (41), 4 states have call predecessors, (41), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-05 05:20:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:20:51,249 INFO L93 Difference]: Finished difference Result 400 states and 490 transitions. [2022-04-05 05:20:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 05:20:51,249 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 87 states have internal predecessors, (135), 38 states have call successors, (41), 4 states have call predecessors, (41), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 111 [2022-04-05 05:20:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:20:51,250 INFO L225 Difference]: With dead ends: 400 [2022-04-05 05:20:51,250 INFO L226 Difference]: Without dead ends: 323 [2022-04-05 05:20:51,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2789, Invalid=20773, Unknown=0, NotChecked=0, Total=23562 [2022-04-05 05:20:51,252 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 310 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3120 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 3120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:20:51,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 191 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 3120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 05:20:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-04-05 05:20:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2022-04-05 05:20:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 226 states have (on average 1.0663716814159292) internal successors, (241), 233 states have internal predecessors, (241), 82 states have call successors, (82), 13 states have call predecessors, (82), 12 states have return successors, (81), 74 states have call predecessors, (81), 81 states have call successors, (81) [2022-04-05 05:20:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 404 transitions. [2022-04-05 05:20:51,319 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 404 transitions. Word has length 111 [2022-04-05 05:20:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:20:51,320 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 404 transitions. [2022-04-05 05:20:51,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 87 states have internal predecessors, (135), 38 states have call successors, (41), 4 states have call predecessors, (41), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-05 05:20:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 404 transitions. [2022-04-05 05:20:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-05 05:20:51,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:20:51,322 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:20:51,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 05:20:51,535 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 [2022-04-05 05:20:51,536 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:20:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:20:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 192526558, now seen corresponding path program 15 times [2022-04-05 05:20:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:20:51,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032906297] [2022-04-05 05:20:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:20:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:20:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:20:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-05 05:20:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 05:20:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 05:20:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-05 05:20:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 05:20:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-05 05:20:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 05:20:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 05:20:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 05:20:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 05:20:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-05 05:20:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-05 05:20:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-05 05:20:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:20:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 236 proven. 155 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-05 05:20:52,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:20:52,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032906297] [2022-04-05 05:20:52,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032906297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:20:52,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813301404] [2022-04-05 05:20:52,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:20:52,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:20:52,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:20:52,353 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) [2022-04-05 05:20:52,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 05:20:52,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-04-05 05:20:52,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:20:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 05:20:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:20:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-05 05:20:53,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:20:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-05 05:20:55,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813301404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:20:55,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:20:55,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 96 [2022-04-05 05:20:55,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664660772] [2022-04-05 05:20:55,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:20:55,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-05 05:20:55,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:20:55,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-05 05:20:55,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=8088, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 05:20:55,797 INFO L87 Difference]: Start difference. First operand 321 states and 404 transitions. Second operand has 96 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 93 states have internal predecessors, (144), 41 states have call successors, (44), 4 states have call predecessors, (44), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-05 05:21:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:21:00,817 INFO L93 Difference]: Finished difference Result 370 states and 447 transitions. [2022-04-05 05:21:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-05 05:21:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 93 states have internal predecessors, (144), 41 states have call successors, (44), 4 states have call predecessors, (44), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 119 [2022-04-05 05:21:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:21:00,821 INFO L225 Difference]: With dead ends: 370 [2022-04-05 05:21:00,821 INFO L226 Difference]: Without dead ends: 282 [2022-04-05 05:21:00,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 204 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5427 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2282, Invalid=19180, Unknown=0, NotChecked=0, Total=21462 [2022-04-05 05:21:00,823 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 05:21:00,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 157 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 05:21:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-05 05:21:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-04-05 05:21:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 199 states have (on average 1.07035175879397) internal successors, (213), 206 states have internal predecessors, (213), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 62 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-05 05:21:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 352 transitions. [2022-04-05 05:21:00,885 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 352 transitions. Word has length 119 [2022-04-05 05:21:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:21:00,885 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 352 transitions. [2022-04-05 05:21:00,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 93 states have internal predecessors, (144), 41 states have call successors, (44), 4 states have call predecessors, (44), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-05 05:21:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 352 transitions. [2022-04-05 05:21:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-05 05:21:00,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:21:00,887 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:21:00,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-05 05:21:01,103 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 [2022-04-05 05:21:01,103 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:21:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:21:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1112332058, now seen corresponding path program 16 times [2022-04-05 05:21:01,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:21:01,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542830904] [2022-04-05 05:21:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:21:01,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:21:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:21:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 05:21:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 05:21:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 05:21:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 05:21:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 05:21:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 05:21:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-05 05:21:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 05:21:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 05:21:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-05 05:21:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 05:21:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-05 05:21:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-05 05:21:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-05 05:21:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 275 proven. 174 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-05 05:21:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:21:02,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542830904] [2022-04-05 05:21:02,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542830904] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:21:02,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390567774] [2022-04-05 05:21:02,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:21:02,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:21:02,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:21:02,073 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) [2022-04-05 05:21:02,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 05:21:02,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:21:02,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:21:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-05 05:21:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:21:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-05 05:21:03,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:21:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-05 05:21:05,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390567774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:21:05,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:21:05,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 87 [2022-04-05 05:21:05,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508729390] [2022-04-05 05:21:05,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:21:05,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-05 05:21:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:21:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-05 05:21:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=6457, Unknown=0, NotChecked=0, Total=7482 [2022-04-05 05:21:05,090 INFO L87 Difference]: Start difference. First operand 281 states and 352 transitions. Second operand has 87 states, 86 states have (on average 1.6046511627906976) internal successors, (138), 84 states have internal predecessors, (138), 44 states have call successors, (47), 4 states have call predecessors, (47), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-05 05:21:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:21:11,459 INFO L93 Difference]: Finished difference Result 415 states and 511 transitions. [2022-04-05 05:21:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-05 05:21:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.6046511627906976) internal successors, (138), 84 states have internal predecessors, (138), 44 states have call successors, (47), 4 states have call predecessors, (47), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 127 [2022-04-05 05:21:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:21:11,461 INFO L225 Difference]: With dead ends: 415 [2022-04-05 05:21:11,461 INFO L226 Difference]: Without dead ends: 332 [2022-04-05 05:21:11,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6507 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3231, Invalid=21891, Unknown=0, NotChecked=0, Total=25122 [2022-04-05 05:21:11,464 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 345 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4229 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 4738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 4229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:21:11,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 228 Invalid, 4738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 4229 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 05:21:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-05 05:21:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2022-04-05 05:21:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 234 states have (on average 1.0726495726495726) internal successors, (251), 241 states have internal predecessors, (251), 84 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-05 05:21:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 418 transitions. [2022-04-05 05:21:11,550 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 418 transitions. Word has length 127 [2022-04-05 05:21:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:21:11,550 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 418 transitions. [2022-04-05 05:21:11,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.6046511627906976) internal successors, (138), 84 states have internal predecessors, (138), 44 states have call successors, (47), 4 states have call predecessors, (47), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-05 05:21:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 418 transitions. [2022-04-05 05:21:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-05 05:21:11,552 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:21:11,552 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:21:11,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 05:21:11,767 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 [2022-04-05 05:21:11,767 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:21:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:21:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1049589922, now seen corresponding path program 17 times [2022-04-05 05:21:11,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:21:11,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492730777] [2022-04-05 05:21:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:21:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:21:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:21:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-05 05:21:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 05:21:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 05:21:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 05:21:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 05:21:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-05 05:21:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 05:21:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-05 05:21:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-05 05:21:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-05 05:21:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-05 05:21:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-05 05:21:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-05 05:21:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-04-05 05:21:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-04-05 05:21:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 317 proven. 194 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-05 05:21:12,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:21:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492730777] [2022-04-05 05:21:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492730777] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:21:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512929708] [2022-04-05 05:21:12,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:21:12,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:21:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:21:12,788 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) [2022-04-05 05:21:12,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 05:21:12,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-04-05 05:21:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:21:12,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 05:21:12,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:21:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-05 05:21:13,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:21:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-05 05:21:16,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512929708] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:21:16,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:21:16,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 92 [2022-04-05 05:21:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116142000] [2022-04-05 05:21:16,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:21:16,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-05 05:21:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:21:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-05 05:21:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=7225, Unknown=0, NotChecked=0, Total=8372 [2022-04-05 05:21:16,041 INFO L87 Difference]: Start difference. First operand 331 states and 418 transitions. Second operand has 92 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 89 states have internal predecessors, (146), 47 states have call successors, (50), 4 states have call predecessors, (50), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-05 05:21:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:21:23,064 INFO L93 Difference]: Finished difference Result 452 states and 558 transitions. [2022-04-05 05:21:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-05 05:21:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 89 states have internal predecessors, (146), 47 states have call successors, (50), 4 states have call predecessors, (50), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 135 [2022-04-05 05:21:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:21:23,067 INFO L225 Difference]: With dead ends: 452 [2022-04-05 05:21:23,067 INFO L226 Difference]: Without dead ends: 362 [2022-04-05 05:21:23,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 247 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7312 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3599, Invalid=24457, Unknown=0, NotChecked=0, Total=28056 [2022-04-05 05:21:23,069 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 382 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4312 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 4312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:21:23,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 229 Invalid, 4834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 4312 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 05:21:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-05 05:21:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2022-04-05 05:21:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 254 states have (on average 1.0708661417322836) internal successors, (272), 262 states have internal predecessors, (272), 93 states have call successors, (93), 13 states have call predecessors, (93), 12 states have return successors, (92), 84 states have call predecessors, (92), 92 states have call successors, (92) [2022-04-05 05:21:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 457 transitions. [2022-04-05 05:21:23,152 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 457 transitions. Word has length 135 [2022-04-05 05:21:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:21:23,152 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 457 transitions. [2022-04-05 05:21:23,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 89 states have internal predecessors, (146), 47 states have call successors, (50), 4 states have call predecessors, (50), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-05 05:21:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 457 transitions. [2022-04-05 05:21:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-05 05:21:23,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:21:23,154 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:21:23,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 05:21:23,364 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 [2022-04-05 05:21:23,364 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:21:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:21:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 658164890, now seen corresponding path program 18 times [2022-04-05 05:21:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:21:23,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518716512] [2022-04-05 05:21:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:21:23,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:21:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:21:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-05 05:21:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 05:21:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 05:21:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 05:21:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 05:21:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 05:21:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-05 05:21:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 05:21:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-05 05:21:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-05 05:21:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-05 05:21:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-05 05:21:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 05:21:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-05 05:21:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-04-05 05:21:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-05 05:21:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 362 proven. 215 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 05:21:24,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:21:24,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518716512] [2022-04-05 05:21:24,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518716512] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:21:24,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629473125] [2022-04-05 05:21:24,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:21:24,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:21:24,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:21:24,429 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) [2022-04-05 05:21:24,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 05:21:24,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-04-05 05:21:24,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:21:24,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-05 05:21:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:21:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 05:21:26,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:21:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 05:21:28,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629473125] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:21:28,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:21:28,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 114 [2022-04-05 05:21:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398990878] [2022-04-05 05:21:28,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:21:28,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-04-05 05:21:28,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:21:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-04-05 05:21:28,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1449, Invalid=11433, Unknown=0, NotChecked=0, Total=12882 [2022-04-05 05:21:28,950 INFO L87 Difference]: Start difference. First operand 360 states and 457 transitions. Second operand has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 111 states have internal predecessors, (171), 50 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-05 05:21:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:21:36,161 INFO L93 Difference]: Finished difference Result 454 states and 558 transitions. [2022-04-05 05:21:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-05 05:21:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 111 states have internal predecessors, (171), 50 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Word has length 143 [2022-04-05 05:21:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:21:36,163 INFO L225 Difference]: With dead ends: 454 [2022-04-05 05:21:36,163 INFO L226 Difference]: Without dead ends: 357 [2022-04-05 05:21:36,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7677 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=3182, Invalid=26920, Unknown=0, NotChecked=0, Total=30102 [2022-04-05 05:21:36,166 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3394 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:21:36,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 225 Invalid, 3646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3394 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 05:21:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-04-05 05:21:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2022-04-05 05:21:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 252 states have (on average 1.0674603174603174) internal successors, (269), 259 states have internal predecessors, (269), 92 states have call successors, (92), 13 states have call predecessors, (92), 12 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-05 05:21:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 452 transitions. [2022-04-05 05:21:36,260 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 452 transitions. Word has length 143 [2022-04-05 05:21:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:21:36,260 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 452 transitions. [2022-04-05 05:21:36,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 111 states have internal predecessors, (171), 50 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-05 05:21:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 452 transitions. [2022-04-05 05:21:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-04-05 05:21:36,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:21:36,262 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:21:36,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 05:21:36,475 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 [2022-04-05 05:21:36,475 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:21:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:21:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 829165508, now seen corresponding path program 19 times [2022-04-05 05:21:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:21:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805154692] [2022-04-05 05:21:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:21:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:21:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:21:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 05:21:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 05:21:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 05:21:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 05:21:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 05:21:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 05:21:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 05:21:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-05 05:21:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 05:21:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-05 05:21:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-05 05:21:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-05 05:21:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-05 05:21:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-05 05:21:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-05 05:21:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-05 05:21:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 168 proven. 427 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 05:21:37,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:21:37,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805154692] [2022-04-05 05:21:37,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805154692] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:21:37,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962762074] [2022-04-05 05:21:37,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:21:37,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:21:37,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:21:37,001 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) [2022-04-05 05:21:37,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 05:21:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-05 05:21:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:21:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 32 proven. 563 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 05:21:37,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:21:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 32 proven. 563 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 05:21:38,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962762074] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:21:38,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:21:38,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-05 05:21:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908454396] [2022-04-05 05:21:38,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:21:38,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-05 05:21:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:21:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-05 05:21:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2022-04-05 05:21:38,357 INFO L87 Difference]: Start difference. First operand 357 states and 452 transitions. Second operand has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 75 states have internal predecessors, (104), 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) [2022-04-05 05:21:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:21:39,724 INFO L93 Difference]: Finished difference Result 376 states and 474 transitions. [2022-04-05 05:21:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 05:21:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 75 states have internal predecessors, (104), 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 144 [2022-04-05 05:21:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:21:39,726 INFO L225 Difference]: With dead ends: 376 [2022-04-05 05:21:39,726 INFO L226 Difference]: Without dead ends: 374 [2022-04-05 05:21:39,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 282 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3793 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2312, Invalid=11260, Unknown=0, NotChecked=0, Total=13572 [2022-04-05 05:21:39,727 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:21:39,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 154 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 05:21:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-04-05 05:21:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 370. [2022-04-05 05:21:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 261 states have (on average 1.0651340996168583) internal successors, (278), 268 states have internal predecessors, (278), 95 states have call successors, (95), 14 states have call predecessors, (95), 13 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-05 05:21:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 467 transitions. [2022-04-05 05:21:39,812 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 467 transitions. Word has length 144 [2022-04-05 05:21:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:21:39,812 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 467 transitions. [2022-04-05 05:21:39,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 75 states have internal predecessors, (104), 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) [2022-04-05 05:21:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 467 transitions. [2022-04-05 05:21:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-05 05:21:39,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:21:39,814 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:21:39,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-05 05:21:40,024 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 [2022-04-05 05:21:40,025 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:21:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:21:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1744210466, now seen corresponding path program 20 times [2022-04-05 05:21:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:21:40,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701141081] [2022-04-05 05:21:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:21:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:21:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:21:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 05:21:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 05:21:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 05:21:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 05:21:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 05:21:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 05:21:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 05:21:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-05 05:21:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 05:21:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-05 05:21:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-05 05:21:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-05 05:21:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-05 05:21:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-05 05:21:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-05 05:21:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-05 05:21:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-04-05 05:21:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 410 proven. 237 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-05 05:21:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:21:41,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701141081] [2022-04-05 05:21:41,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701141081] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:21:41,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144173393] [2022-04-05 05:21:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:21:41,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:21:41,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:21:41,195 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) [2022-04-05 05:21:41,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-05 05:21:41,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:21:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:21:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-05 05:21:41,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:21:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 34 proven. 613 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-05 05:21:43,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:21:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 34 proven. 613 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-05 05:21:46,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144173393] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:21:46,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:21:46,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 120 [2022-04-05 05:21:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441433731] [2022-04-05 05:21:46,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:21:46,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-04-05 05:21:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:21:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-04-05 05:21:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=12473, Unknown=0, NotChecked=0, Total=14280 [2022-04-05 05:21:46,021 INFO L87 Difference]: Start difference. First operand 370 states and 467 transitions. Second operand has 120 states, 119 states have (on average 1.5126050420168067) internal successors, (180), 117 states have internal predecessors, (180), 53 states have call successors, (56), 4 states have call predecessors, (56), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-05 05:21:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:21:54,954 INFO L93 Difference]: Finished difference Result 506 states and 626 transitions. [2022-04-05 05:21:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-05 05:21:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.5126050420168067) internal successors, (180), 117 states have internal predecessors, (180), 53 states have call successors, (56), 4 states have call predecessors, (56), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Word has length 151 [2022-04-05 05:21:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:21:54,957 INFO L225 Difference]: With dead ends: 506 [2022-04-05 05:21:54,957 INFO L226 Difference]: Without dead ends: 406 [2022-04-05 05:21:54,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 260 SyntacticMatches, 3 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12313 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=4809, Invalid=36603, Unknown=0, NotChecked=0, Total=41412 [2022-04-05 05:21:54,959 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 449 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 5711 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 6391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 5711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:21:54,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 251 Invalid, 6391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 5711 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-05 05:21:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-04-05 05:21:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2022-04-05 05:21:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 285 states have (on average 1.0701754385964912) internal successors, (305), 293 states have internal predecessors, (305), 105 states have call successors, (105), 14 states have call predecessors, (105), 13 states have return successors, (104), 96 states have call predecessors, (104), 104 states have call successors, (104) [2022-04-05 05:21:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 514 transitions. [2022-04-05 05:21:55,079 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 514 transitions. Word has length 151 [2022-04-05 05:21:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:21:55,079 INFO L478 AbstractCegarLoop]: Abstraction has 404 states and 514 transitions. [2022-04-05 05:21:55,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 1.5126050420168067) internal successors, (180), 117 states have internal predecessors, (180), 53 states have call successors, (56), 4 states have call predecessors, (56), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-05 05:21:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 514 transitions. [2022-04-05 05:21:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-05 05:21:55,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:21:55,082 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:21:55,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-05 05:21:55,295 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 [2022-04-05 05:21:55,295 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:21:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:21:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1740987878, now seen corresponding path program 21 times [2022-04-05 05:21:55,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:21:55,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029896071] [2022-04-05 05:21:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:21:55,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:21:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:21:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 05:21:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 05:21:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-05 05:21:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 05:21:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 05:21:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 05:21:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 05:21:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 05:21:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-05 05:21:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-05 05:21:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-05 05:21:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-05 05:21:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-05 05:21:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-05 05:21:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 05:21:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-05 05:21:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-04-05 05:21:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-05 05:21:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:21:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 461 proven. 260 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 05:21:56,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:21:56,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029896071] [2022-04-05 05:21:56,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029896071] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:21:56,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769041439] [2022-04-05 05:21:56,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:21:56,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:21:56,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:21:56,627 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) [2022-04-05 05:21:56,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-05 05:21:56,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-04-05 05:21:56,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:21:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 05:21:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:21:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 05:21:58,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:22:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 05:22:01,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769041439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:22:01,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:22:01,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 126 [2022-04-05 05:22:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420612000] [2022-04-05 05:22:01,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:22:01,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-04-05 05:22:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:22:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-04-05 05:22:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=13983, Unknown=0, NotChecked=0, Total=15750 [2022-04-05 05:22:01,909 INFO L87 Difference]: Start difference. First operand 404 states and 514 transitions. Second operand has 126 states, 125 states have (on average 1.512) internal successors, (189), 123 states have internal predecessors, (189), 56 states have call successors, (59), 4 states have call predecessors, (59), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-05 05:22:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:22:10,676 INFO L93 Difference]: Finished difference Result 508 states and 626 transitions. [2022-04-05 05:22:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 05:22:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.512) internal successors, (189), 123 states have internal predecessors, (189), 56 states have call successors, (59), 4 states have call predecessors, (59), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Word has length 159 [2022-04-05 05:22:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:22:10,678 INFO L225 Difference]: With dead ends: 508 [2022-04-05 05:22:10,678 INFO L226 Difference]: Without dead ends: 401 [2022-04-05 05:22:10,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 274 SyntacticMatches, 3 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9392 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3867, Invalid=32805, Unknown=0, NotChecked=0, Total=36672 [2022-04-05 05:22:10,680 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:22:10,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 177 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-05 05:22:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-04-05 05:22:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-04-05 05:22:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 283 states have (on average 1.0671378091872792) internal successors, (302), 290 states have internal predecessors, (302), 104 states have call successors, (104), 14 states have call predecessors, (104), 13 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-05 05:22:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 509 transitions. [2022-04-05 05:22:10,816 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 509 transitions. Word has length 159 [2022-04-05 05:22:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:22:10,816 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 509 transitions. [2022-04-05 05:22:10,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.512) internal successors, (189), 123 states have internal predecessors, (189), 56 states have call successors, (59), 4 states have call predecessors, (59), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-05 05:22:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 509 transitions. [2022-04-05 05:22:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-05 05:22:10,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:22:10,818 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:22:10,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-05 05:22:11,022 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 [2022-04-05 05:22:11,023 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:22:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:22:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash -781954748, now seen corresponding path program 22 times [2022-04-05 05:22:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:22:11,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481211600] [2022-04-05 05:22:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:22:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:22:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:22:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 05:22:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 05:22:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 05:22:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-05 05:22:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 05:22:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 05:22:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 05:22:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 05:22:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-05 05:22:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-05 05:22:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-05 05:22:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-05 05:22:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-05 05:22:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-05 05:22:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-05 05:22:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-05 05:22:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-05 05:22:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-04-05 05:22:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 207 proven. 534 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 05:22:11,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:22:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481211600] [2022-04-05 05:22:11,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481211600] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:22:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66519032] [2022-04-05 05:22:11,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:22:11,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:22:11,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:22:11,652 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) [2022-04-05 05:22:11,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-05 05:22:11,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:22:11,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:22:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-05 05:22:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:22:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 36 proven. 705 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 05:22:12,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:22:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 36 proven. 705 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-05 05:22:13,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66519032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:22:13,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:22:13,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-05 05:22:13,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250061989] [2022-04-05 05:22:13,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:22:13,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-05 05:22:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:22:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-05 05:22:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1124, Invalid=6186, Unknown=0, NotChecked=0, Total=7310 [2022-04-05 05:22:13,513 INFO L87 Difference]: Start difference. First operand 401 states and 509 transitions. Second operand has 86 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 83 states have internal predecessors, (114), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 05:22:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:22:15,355 INFO L93 Difference]: Finished difference Result 417 states and 527 transitions. [2022-04-05 05:22:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-05 05:22:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 83 states have internal predecessors, (114), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 160 [2022-04-05 05:22:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:22:15,358 INFO L225 Difference]: With dead ends: 417 [2022-04-05 05:22:15,358 INFO L226 Difference]: Without dead ends: 415 [2022-04-05 05:22:15,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 314 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2825, Invalid=13687, Unknown=0, NotChecked=0, Total=16512 [2022-04-05 05:22:15,359 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:22:15,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 169 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 05:22:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-04-05 05:22:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 411. [2022-04-05 05:22:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 290 states have (on average 1.0655172413793104) internal successors, (309), 297 states have internal predecessors, (309), 106 states have call successors, (106), 15 states have call predecessors, (106), 14 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2022-04-05 05:22:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 520 transitions. [2022-04-05 05:22:15,498 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 520 transitions. Word has length 160 [2022-04-05 05:22:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:22:15,498 INFO L478 AbstractCegarLoop]: Abstraction has 411 states and 520 transitions. [2022-04-05 05:22:15,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 83 states have internal predecessors, (114), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 05:22:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 520 transitions. [2022-04-05 05:22:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-05 05:22:15,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:22:15,501 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:22:15,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-05 05:22:15,720 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 [2022-04-05 05:22:15,721 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:22:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:22:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1374911394, now seen corresponding path program 23 times [2022-04-05 05:22:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:22:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228138264] [2022-04-05 05:22:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:22:15,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:22:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:22:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-05 05:22:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 05:22:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 05:22:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-05 05:22:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 05:22:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 05:22:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 05:22:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 05:22:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-05 05:22:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-05 05:22:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-05 05:22:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-05 05:22:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-05 05:22:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-05 05:22:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-05 05:22:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-05 05:22:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-05 05:22:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-04-05 05:22:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-04-05 05:22:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 515 proven. 284 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-05 05:22:17,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:22:17,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228138264] [2022-04-05 05:22:17,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228138264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:22:17,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768888872] [2022-04-05 05:22:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:22:17,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:22:17,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:22:17,157 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) [2022-04-05 05:22:17,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-05 05:22:17,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-04-05 05:22:17,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:22:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-05 05:22:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:22:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-05 05:22:18,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:22:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-05 05:22:22,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768888872] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:22:22,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:22:22,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 112 [2022-04-05 05:22:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105839768] [2022-04-05 05:22:22,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:22:22,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-05 05:22:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:22:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-05 05:22:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1705, Invalid=10727, Unknown=0, NotChecked=0, Total=12432 [2022-04-05 05:22:22,273 INFO L87 Difference]: Start difference. First operand 411 states and 520 transitions. Second operand has 112 states, 111 states have (on average 1.6036036036036037) internal successors, (178), 109 states have internal predecessors, (178), 59 states have call successors, (62), 4 states have call predecessors, (62), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-05 05:22:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:22:33,707 INFO L93 Difference]: Finished difference Result 560 states and 694 transitions. [2022-04-05 05:22:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-05 05:22:33,708 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 1.6036036036036037) internal successors, (178), 109 states have internal predecessors, (178), 59 states have call successors, (62), 4 states have call predecessors, (62), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Word has length 167 [2022-04-05 05:22:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:22:33,710 INFO L225 Difference]: With dead ends: 560 [2022-04-05 05:22:33,710 INFO L226 Difference]: Without dead ends: 450 [2022-04-05 05:22:33,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 307 SyntacticMatches, 4 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10829 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=5271, Invalid=36141, Unknown=0, NotChecked=0, Total=41412 [2022-04-05 05:22:33,712 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 497 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 6630 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 7376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 6630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:22:33,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 288 Invalid, 7376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 6630 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-05 05:22:33,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-04-05 05:22:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2022-04-05 05:22:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 316 states have (on average 1.0696202531645569) internal successors, (338), 324 states have internal predecessors, (338), 117 states have call successors, (117), 15 states have call predecessors, (117), 14 states have return successors, (116), 108 states have call predecessors, (116), 116 states have call successors, (116) [2022-04-05 05:22:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 571 transitions. [2022-04-05 05:22:33,832 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 571 transitions. Word has length 167 [2022-04-05 05:22:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:22:33,832 INFO L478 AbstractCegarLoop]: Abstraction has 448 states and 571 transitions. [2022-04-05 05:22:33,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 1.6036036036036037) internal successors, (178), 109 states have internal predecessors, (178), 59 states have call successors, (62), 4 states have call predecessors, (62), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-05 05:22:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 571 transitions. [2022-04-05 05:22:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-05 05:22:33,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:22:33,834 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:22:33,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-05 05:22:34,050 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 [2022-04-05 05:22:34,051 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:22:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:22:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 360994714, now seen corresponding path program 24 times [2022-04-05 05:22:34,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:22:34,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802335822] [2022-04-05 05:22:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:22:34,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:22:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:22:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 05:22:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 05:22:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-05 05:22:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 05:22:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-05 05:22:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 05:22:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 05:22:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 05:22:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 05:22:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-05 05:22:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-05 05:22:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-05 05:22:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-05 05:22:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-05 05:22:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-05 05:22:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-04-05 05:22:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-05 05:22:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-04-05 05:22:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-05 05:22:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-04-05 05:22:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 572 proven. 309 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-05 05:22:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:22:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802335822] [2022-04-05 05:22:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802335822] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:22:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267023075] [2022-04-05 05:22:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:22:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:22:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:22:35,570 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) [2022-04-05 05:22:35,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-05 05:22:35,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-04-05 05:22:35,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:22:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 05:22:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:22:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-05 05:22:38,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:22:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-05 05:22:41,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267023075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:22:41,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:22:41,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48, 48] total 138 [2022-04-05 05:22:41,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498530158] [2022-04-05 05:22:41,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:22:41,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-04-05 05:22:41,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:22:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-04-05 05:22:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=16789, Unknown=0, NotChecked=0, Total=18906 [2022-04-05 05:22:41,938 INFO L87 Difference]: Start difference. First operand 448 states and 571 transitions. Second operand has 138 states, 137 states have (on average 1.510948905109489) internal successors, (207), 135 states have internal predecessors, (207), 62 states have call successors, (65), 4 states have call predecessors, (65), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-05 05:22:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:22:53,212 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-04-05 05:22:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-05 05:22:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 1.510948905109489) internal successors, (207), 135 states have internal predecessors, (207), 62 states have call successors, (65), 4 states have call predecessors, (65), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Word has length 175 [2022-04-05 05:22:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:22:53,214 INFO L225 Difference]: With dead ends: 566 [2022-04-05 05:22:53,214 INFO L226 Difference]: Without dead ends: 449 [2022-04-05 05:22:53,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 302 SyntacticMatches, 3 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11279 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4620, Invalid=39270, Unknown=0, NotChecked=0, Total=43890 [2022-04-05 05:22:53,217 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 105 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 4804 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 5172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 4804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:22:53,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 259 Invalid, 5172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 4804 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-05 05:22:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-04-05 05:22:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 448. [2022-04-05 05:22:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 316 states have (on average 1.0664556962025316) internal successors, (337), 324 states have internal predecessors, (337), 117 states have call successors, (117), 15 states have call predecessors, (117), 14 states have return successors, (116), 108 states have call predecessors, (116), 116 states have call successors, (116) [2022-04-05 05:22:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 570 transitions. [2022-04-05 05:22:53,347 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 570 transitions. Word has length 175 [2022-04-05 05:22:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:22:53,347 INFO L478 AbstractCegarLoop]: Abstraction has 448 states and 570 transitions. [2022-04-05 05:22:53,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 1.510948905109489) internal successors, (207), 135 states have internal predecessors, (207), 62 states have call successors, (65), 4 states have call predecessors, (65), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-05 05:22:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 570 transitions. [2022-04-05 05:22:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-05 05:22:53,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:22:53,349 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:22:53,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-05 05:22:53,563 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 [2022-04-05 05:22:53,563 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:22:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:22:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash 927888068, now seen corresponding path program 25 times [2022-04-05 05:22:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:22:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140873029] [2022-04-05 05:22:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:22:53,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:22:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:22:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 05:22:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 05:22:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 05:22:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 05:22:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 05:22:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-05 05:22:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 05:22:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 05:22:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-05 05:22:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 05:22:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-05 05:22:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-05 05:22:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-05 05:22:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-04-05 05:22:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-04-05 05:22:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-05 05:22:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-04-05 05:22:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-05 05:22:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-04-05 05:22:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-04-05 05:22:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 250 proven. 653 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-05 05:22:54,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:22:54,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140873029] [2022-04-05 05:22:54,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140873029] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:22:54,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330505576] [2022-04-05 05:22:54,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:22:54,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:22:54,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:22:54,196 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) [2022-04-05 05:22:54,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-05 05:22:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:22:54,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 05:22:54,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:22:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 40 proven. 863 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-05 05:22:55,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:22:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 40 proven. 863 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-05 05:22:56,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330505576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:22:56,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:22:56,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-05 05:22:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347979510] [2022-04-05 05:22:56,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:22:56,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-05 05:22:56,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:22:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-05 05:22:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1345, Invalid=7397, Unknown=0, NotChecked=0, Total=8742 [2022-04-05 05:22:56,109 INFO L87 Difference]: Start difference. First operand 448 states and 570 transitions. Second operand has 94 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 91 states have internal predecessors, (124), 22 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 05:22:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:22:58,160 INFO L93 Difference]: Finished difference Result 464 states and 588 transitions. [2022-04-05 05:22:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-05 05:22:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 91 states have internal predecessors, (124), 22 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 176 [2022-04-05 05:22:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:22:58,163 INFO L225 Difference]: With dead ends: 464 [2022-04-05 05:22:58,163 INFO L226 Difference]: Without dead ends: 462 [2022-04-05 05:22:58,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 346 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5567 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3390, Invalid=16350, Unknown=0, NotChecked=0, Total=19740 [2022-04-05 05:22:58,165 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:22:58,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 179 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 05:22:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-04-05 05:22:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2022-04-05 05:22:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 323 states have (on average 1.065015479876161) internal successors, (344), 331 states have internal predecessors, (344), 119 states have call successors, (119), 16 states have call predecessors, (119), 15 states have return successors, (118), 110 states have call predecessors, (118), 118 states have call successors, (118) [2022-04-05 05:22:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 581 transitions. [2022-04-05 05:22:58,306 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 581 transitions. Word has length 176 [2022-04-05 05:22:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:22:58,307 INFO L478 AbstractCegarLoop]: Abstraction has 458 states and 581 transitions. [2022-04-05 05:22:58,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 91 states have internal predecessors, (124), 22 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 05:22:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 581 transitions. [2022-04-05 05:22:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-05 05:22:58,308 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:22:58,308 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:22:58,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-05 05:22:58,514 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 [2022-04-05 05:22:58,514 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:22:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:22:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1539198242, now seen corresponding path program 26 times [2022-04-05 05:22:58,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:22:58,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113016124] [2022-04-05 05:22:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:22:58,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:22:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:23:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 05:23:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 05:23:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 05:23:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 05:23:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 05:23:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-05 05:23:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 05:23:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 05:23:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-05 05:23:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 05:23:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-05 05:23:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-05 05:23:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-05 05:23:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-04-05 05:23:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-04-05 05:23:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-05 05:23:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-04-05 05:23:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-05 05:23:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-04-05 05:23:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-04-05 05:23:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-04-05 05:23:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 632 proven. 335 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-05 05:23:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:23:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113016124] [2022-04-05 05:23:00,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113016124] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:23:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505566916] [2022-04-05 05:23:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:23:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:23:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:23:00,139 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) [2022-04-05 05:23:00,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-05 05:23:00,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:23:00,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:23:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 136 conjunts are in the unsatisfiable core [2022-04-05 05:23:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:23:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-05 05:23:02,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:23:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-05 05:23:06,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505566916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:23:06,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:23:06,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 144 [2022-04-05 05:23:06,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286485662] [2022-04-05 05:23:06,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:23:06,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-04-05 05:23:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:23:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-04-05 05:23:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2597, Invalid=17995, Unknown=0, NotChecked=0, Total=20592 [2022-04-05 05:23:06,749 INFO L87 Difference]: Start difference. First operand 458 states and 581 transitions. Second operand has 144 states, 143 states have (on average 1.5104895104895104) internal successors, (216), 141 states have internal predecessors, (216), 65 states have call successors, (68), 4 states have call predecessors, (68), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-05 05:23:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:23:20,112 INFO L93 Difference]: Finished difference Result 654 states and 813 transitions. [2022-04-05 05:23:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-05 05:23:20,113 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 1.5104895104895104) internal successors, (216), 141 states have internal predecessors, (216), 65 states have call successors, (68), 4 states have call predecessors, (68), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Word has length 183 [2022-04-05 05:23:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:23:20,115 INFO L225 Difference]: With dead ends: 654 [2022-04-05 05:23:20,115 INFO L226 Difference]: Without dead ends: 534 [2022-04-05 05:23:20,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 316 SyntacticMatches, 3 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17632 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=6821, Invalid=52471, Unknown=0, NotChecked=0, Total=59292 [2022-04-05 05:23:20,118 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 560 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 8785 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 9670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 8785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:23:20,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 325 Invalid, 9670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 8785 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-05 05:23:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-04-05 05:23:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2022-04-05 05:23:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 374 states have (on average 1.0641711229946524) internal successors, (398), 383 states have internal predecessors, (398), 141 states have call successors, (141), 17 states have call predecessors, (141), 16 states have return successors, (140), 131 states have call predecessors, (140), 140 states have call successors, (140) [2022-04-05 05:23:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 679 transitions. [2022-04-05 05:23:20,287 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 679 transitions. Word has length 183 [2022-04-05 05:23:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:23:20,288 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 679 transitions. [2022-04-05 05:23:20,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 1.5104895104895104) internal successors, (216), 141 states have internal predecessors, (216), 65 states have call successors, (68), 4 states have call predecessors, (68), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-05 05:23:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 679 transitions. [2022-04-05 05:23:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-05 05:23:20,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:23:20,289 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:23:20,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-05 05:23:20,495 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 [2022-04-05 05:23:20,496 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:23:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:23:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1565519130, now seen corresponding path program 27 times [2022-04-05 05:23:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:23:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281078826] [2022-04-05 05:23:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:23:20,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:23:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:23:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 05:23:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 05:23:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 05:23:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 05:23:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-05 05:23:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 05:23:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-05 05:23:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-05 05:23:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-05 05:23:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-05 05:23:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-05 05:23:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-05 05:23:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-04-05 05:23:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-04-05 05:23:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-04-05 05:23:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-04-05 05:23:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-05 05:23:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-04-05 05:23:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-05 05:23:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-04-05 05:23:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-04-05 05:23:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-04-05 05:23:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 695 proven. 362 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-05 05:23:22,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:23:22,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281078826] [2022-04-05 05:23:22,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281078826] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:23:22,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925293849] [2022-04-05 05:23:22,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:23:22,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:23:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:23:22,206 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) [2022-04-05 05:23:22,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-05 05:23:22,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-04-05 05:23:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:23:22,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 05:23:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:23:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-05 05:23:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:23:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-05 05:23:29,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925293849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:23:29,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:23:29,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52, 52] total 150 [2022-04-05 05:23:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158946764] [2022-04-05 05:23:29,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:23:29,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-04-05 05:23:29,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:23:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-04-05 05:23:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2499, Invalid=19851, Unknown=0, NotChecked=0, Total=22350 [2022-04-05 05:23:29,099 INFO L87 Difference]: Start difference. First operand 532 states and 679 transitions. Second operand has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 147 states have internal predecessors, (225), 68 states have call successors, (71), 4 states have call predecessors, (71), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-04-05 05:23:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:23:42,033 INFO L93 Difference]: Finished difference Result 660 states and 816 transitions. [2022-04-05 05:23:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-05 05:23:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 147 states have internal predecessors, (225), 68 states have call successors, (71), 4 states have call predecessors, (71), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Word has length 191 [2022-04-05 05:23:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:23:42,035 INFO L225 Difference]: With dead ends: 660 [2022-04-05 05:23:42,035 INFO L226 Difference]: Without dead ends: 529 [2022-04-05 05:23:42,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 330 SyntacticMatches, 3 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13338 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=5441, Invalid=46315, Unknown=0, NotChecked=0, Total=51756 [2022-04-05 05:23:42,038 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4265 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 4265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:23:42,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 226 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 4265 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-05 05:23:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-04-05 05:23:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-04-05 05:23:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 372 states have (on average 1.0618279569892473) internal successors, (395), 380 states have internal predecessors, (395), 140 states have call successors, (140), 17 states have call predecessors, (140), 16 states have return successors, (139), 131 states have call predecessors, (139), 139 states have call successors, (139) [2022-04-05 05:23:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 674 transitions. [2022-04-05 05:23:42,204 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 674 transitions. Word has length 191 [2022-04-05 05:23:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:23:42,204 INFO L478 AbstractCegarLoop]: Abstraction has 529 states and 674 transitions. [2022-04-05 05:23:42,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 147 states have internal predecessors, (225), 68 states have call successors, (71), 4 states have call predecessors, (71), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-04-05 05:23:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 674 transitions. [2022-04-05 05:23:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-04-05 05:23:42,206 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:23:42,206 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:23:42,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-05 05:23:42,419 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 [2022-04-05 05:23:42,419 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:23:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:23:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash -782076860, now seen corresponding path program 28 times [2022-04-05 05:23:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:23:42,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110460313] [2022-04-05 05:23:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:23:42,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:23:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:23:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 05:23:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 05:23:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 05:23:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 05:23:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 05:23:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-05 05:23:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 05:23:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-05 05:23:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-05 05:23:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-05 05:23:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-05 05:23:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 05:23:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-05 05:23:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-04-05 05:23:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-05 05:23:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-05 05:23:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-04-05 05:23:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-04-05 05:23:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-04-05 05:23:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-05 05:23:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-04-05 05:23:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-05 05:23:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 297 proven. 784 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-05 05:23:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:23:43,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110460313] [2022-04-05 05:23:43,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110460313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:23:43,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169445103] [2022-04-05 05:23:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:23:43,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:23:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:23:43,129 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) [2022-04-05 05:23:43,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-05 05:23:43,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:23:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:23:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-05 05:23:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:23:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 44 proven. 1037 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-05 05:23:44,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:23:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 44 proven. 1037 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-05 05:23:45,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169445103] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:23:45,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:23:45,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-05 05:23:45,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600415990] [2022-04-05 05:23:45,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:23:45,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-05 05:23:45,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:23:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-05 05:23:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1586, Invalid=8716, Unknown=0, NotChecked=0, Total=10302 [2022-04-05 05:23:45,392 INFO L87 Difference]: Start difference. First operand 529 states and 674 transitions. Second operand has 102 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 99 states have internal predecessors, (134), 24 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 05:23:47,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:23:47,488 INFO L93 Difference]: Finished difference Result 545 states and 692 transitions. [2022-04-05 05:23:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-05 05:23:47,488 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 99 states have internal predecessors, (134), 24 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 192 [2022-04-05 05:23:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:23:47,490 INFO L225 Difference]: With dead ends: 545 [2022-04-05 05:23:47,490 INFO L226 Difference]: Without dead ends: 543 [2022-04-05 05:23:47,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 378 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6580 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4007, Invalid=19249, Unknown=0, NotChecked=0, Total=23256 [2022-04-05 05:23:47,492 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 173 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:23:47,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 189 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 05:23:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-04-05 05:23:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 539. [2022-04-05 05:23:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 379 states have (on average 1.0606860158311346) internal successors, (402), 387 states have internal predecessors, (402), 142 states have call successors, (142), 18 states have call predecessors, (142), 17 states have return successors, (141), 133 states have call predecessors, (141), 141 states have call successors, (141) [2022-04-05 05:23:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 685 transitions. [2022-04-05 05:23:47,660 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 685 transitions. Word has length 192 [2022-04-05 05:23:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:23:47,661 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 685 transitions. [2022-04-05 05:23:47,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 99 states have internal predecessors, (134), 24 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 05:23:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 685 transitions. [2022-04-05 05:23:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-05 05:23:47,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:23:47,662 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:23:47,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-05 05:23:47,875 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 [2022-04-05 05:23:47,875 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:23:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:23:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash 493945182, now seen corresponding path program 29 times [2022-04-05 05:23:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:23:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209684007] [2022-04-05 05:23:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:23:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:23:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:23:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 05:23:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 05:23:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 05:23:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 05:23:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 05:23:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-05 05:23:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 05:23:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-05 05:23:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-05 05:23:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-05 05:23:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-05 05:23:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 05:23:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-05 05:23:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-04-05 05:23:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-05 05:23:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-05 05:23:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-04-05 05:23:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-04-05 05:23:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-04-05 05:23:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-05 05:23:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-04-05 05:23:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-05 05:23:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-04-05 05:23:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:23:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 761 proven. 390 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-05 05:23:49,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:23:49,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209684007] [2022-04-05 05:23:49,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209684007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:23:49,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612295803] [2022-04-05 05:23:49,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:23:49,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:23:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:23:49,689 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) [2022-04-05 05:23:49,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-05 05:23:49,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-04-05 05:23:49,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:23:49,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-05 05:23:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:23:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-05 05:23:51,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:23:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-05 05:23:55,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612295803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:23:55,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:23:55,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 132 [2022-04-05 05:23:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87766600] [2022-04-05 05:23:55,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:23:55,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-04-05 05:23:55,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:23:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-04-05 05:23:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2375, Invalid=14917, Unknown=0, NotChecked=0, Total=17292 [2022-04-05 05:23:55,841 INFO L87 Difference]: Start difference. First operand 539 states and 685 transitions. Second operand has 132 states, 131 states have (on average 1.6030534351145038) internal successors, (210), 129 states have internal predecessors, (210), 71 states have call successors, (74), 4 states have call predecessors, (74), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-04-05 05:24:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:24:11,752 INFO L93 Difference]: Finished difference Result 718 states and 892 transitions. [2022-04-05 05:24:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-05 05:24:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 1.6030534351145038) internal successors, (210), 129 states have internal predecessors, (210), 71 states have call successors, (74), 4 states have call predecessors, (74), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) Word has length 199 [2022-04-05 05:24:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:24:11,754 INFO L225 Difference]: With dead ends: 718 [2022-04-05 05:24:11,754 INFO L226 Difference]: Without dead ends: 584 [2022-04-05 05:24:11,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 367 SyntacticMatches, 4 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15035 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=7263, Invalid=50097, Unknown=0, NotChecked=0, Total=57360 [2022-04-05 05:24:11,757 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 635 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 8898 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 9884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 8898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:24:11,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 317 Invalid, 9884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 8898 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-05 05:24:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-04-05 05:24:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2022-04-05 05:24:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 409 states have (on average 1.0635696821515892) internal successors, (435), 418 states have internal predecessors, (435), 155 states have call successors, (155), 18 states have call predecessors, (155), 17 states have return successors, (154), 145 states have call predecessors, (154), 154 states have call successors, (154) [2022-04-05 05:24:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 744 transitions. [2022-04-05 05:24:11,976 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 744 transitions. Word has length 199 [2022-04-05 05:24:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:24:11,976 INFO L478 AbstractCegarLoop]: Abstraction has 582 states and 744 transitions. [2022-04-05 05:24:11,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 131 states have (on average 1.6030534351145038) internal successors, (210), 129 states have internal predecessors, (210), 71 states have call successors, (74), 4 states have call predecessors, (74), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-04-05 05:24:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 744 transitions. [2022-04-05 05:24:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-05 05:24:11,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:24:11,978 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:24:11,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-05 05:24:12,195 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 [2022-04-05 05:24:12,195 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:24:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:24:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -338337126, now seen corresponding path program 30 times [2022-04-05 05:24:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:24:12,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121662908] [2022-04-05 05:24:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:24:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:24:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:24:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 05:24:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 05:24:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 05:24:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 05:24:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 05:24:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 05:24:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-05 05:24:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 05:24:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-05 05:24:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-05 05:24:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-05 05:24:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-05 05:24:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-05 05:24:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-05 05:24:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-05 05:24:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-04-05 05:24:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-04-05 05:24:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-04-05 05:24:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-04-05 05:24:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-04-05 05:24:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-05 05:24:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-04-05 05:24:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-04-05 05:24:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-04-05 05:24:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 830 proven. 419 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-05 05:24:14,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:24:14,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121662908] [2022-04-05 05:24:14,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121662908] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:24:14,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642758264] [2022-04-05 05:24:14,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:24:14,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:24:14,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:24:14,108 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) [2022-04-05 05:24:14,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-05 05:24:14,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-05 05:24:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:24:14,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-05 05:24:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:24:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-05 05:24:17,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:24:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-05 05:24:22,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642758264] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:24:22,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:24:22,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56, 56] total 162 [2022-04-05 05:24:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090554266] [2022-04-05 05:24:22,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:24:22,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-04-05 05:24:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:24:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-04-05 05:24:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2913, Invalid=23169, Unknown=0, NotChecked=0, Total=26082 [2022-04-05 05:24:22,393 INFO L87 Difference]: Start difference. First operand 582 states and 744 transitions. Second operand has 162 states, 161 states have (on average 1.5093167701863355) internal successors, (243), 159 states have internal predecessors, (243), 74 states have call successors, (77), 4 states have call predecessors, (77), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-04-05 05:24:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:24:37,426 INFO L93 Difference]: Finished difference Result 720 states and 892 transitions. [2022-04-05 05:24:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-05 05:24:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 1.5093167701863355) internal successors, (243), 159 states have internal predecessors, (243), 74 states have call successors, (77), 4 states have call predecessors, (77), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Word has length 207 [2022-04-05 05:24:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:24:37,428 INFO L225 Difference]: With dead ends: 720 [2022-04-05 05:24:37,428 INFO L226 Difference]: Without dead ends: 579 [2022-04-05 05:24:37,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 358 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15569 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=6330, Invalid=53940, Unknown=0, NotChecked=0, Total=60270 [2022-04-05 05:24:37,431 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 137 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3983 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 4445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 3983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:24:37,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 203 Invalid, 4445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 3983 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-05 05:24:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-04-05 05:24:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2022-04-05 05:24:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 407 states have (on average 1.0614250614250613) internal successors, (432), 415 states have internal predecessors, (432), 154 states have call successors, (154), 18 states have call predecessors, (154), 17 states have return successors, (153), 145 states have call predecessors, (153), 153 states have call successors, (153) [2022-04-05 05:24:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 739 transitions. [2022-04-05 05:24:37,626 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 739 transitions. Word has length 207 [2022-04-05 05:24:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:24:37,626 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 739 transitions. [2022-04-05 05:24:37,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 1.5093167701863355) internal successors, (243), 159 states have internal predecessors, (243), 74 states have call successors, (77), 4 states have call predecessors, (77), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-04-05 05:24:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 739 transitions. [2022-04-05 05:24:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-04-05 05:24:37,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:24:37,628 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:24:37,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-05 05:24:37,843 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 [2022-04-05 05:24:37,843 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:24:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:24:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash -875014716, now seen corresponding path program 31 times [2022-04-05 05:24:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:24:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136505616] [2022-04-05 05:24:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:24:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:24:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:24:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 05:24:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-05 05:24:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 05:24:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 05:24:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 05:24:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 05:24:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 05:24:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-05 05:24:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-05 05:24:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-05 05:24:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-05 05:24:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-05 05:24:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-05 05:24:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 05:24:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-05 05:24:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-04-05 05:24:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-05 05:24:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-04-05 05:24:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-04-05 05:24:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-05 05:24:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-04-05 05:24:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-05 05:24:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-04-05 05:24:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-04-05 05:24:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 348 proven. 927 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-05 05:24:38,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:24:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136505616] [2022-04-05 05:24:38,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136505616] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:24:38,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154893201] [2022-04-05 05:24:38,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:24:38,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:24:38,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:24:38,707 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) [2022-04-05 05:24:38,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-05 05:24:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-05 05:24:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:24:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 48 proven. 1227 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-05 05:24:40,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:24:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 48 proven. 1227 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-04-05 05:24:41,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154893201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:24:41,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:24:41,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-05 05:24:41,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93783525] [2022-04-05 05:24:41,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:24:41,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-05 05:24:41,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:24:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-05 05:24:41,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1847, Invalid=10143, Unknown=0, NotChecked=0, Total=11990 [2022-04-05 05:24:41,253 INFO L87 Difference]: Start difference. First operand 579 states and 739 transitions. Second operand has 110 states, 110 states have (on average 1.309090909090909) internal successors, (144), 107 states have internal predecessors, (144), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 05:24:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:24:43,813 INFO L93 Difference]: Finished difference Result 595 states and 757 transitions. [2022-04-05 05:24:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-05 05:24:43,814 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.309090909090909) internal successors, (144), 107 states have internal predecessors, (144), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 208 [2022-04-05 05:24:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:24:43,816 INFO L225 Difference]: With dead ends: 595 [2022-04-05 05:24:43,816 INFO L226 Difference]: Without dead ends: 593 [2022-04-05 05:24:43,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 410 SyntacticMatches, 3 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7677 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4676, Invalid=22384, Unknown=0, NotChecked=0, Total=27060 [2022-04-05 05:24:43,817 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 251 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 05:24:43,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 219 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 05:24:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-04-05 05:24:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 589. [2022-04-05 05:24:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 414 states have (on average 1.0603864734299517) internal successors, (439), 422 states have internal predecessors, (439), 156 states have call successors, (156), 19 states have call predecessors, (156), 18 states have return successors, (155), 147 states have call predecessors, (155), 155 states have call successors, (155) [2022-04-05 05:24:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 750 transitions. [2022-04-05 05:24:44,037 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 750 transitions. Word has length 208 [2022-04-05 05:24:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:24:44,037 INFO L478 AbstractCegarLoop]: Abstraction has 589 states and 750 transitions. [2022-04-05 05:24:44,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.309090909090909) internal successors, (144), 107 states have internal predecessors, (144), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 05:24:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 750 transitions. [2022-04-05 05:24:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-05 05:24:44,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:24:44,039 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:24:44,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-05 05:24:44,239 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 [2022-04-05 05:24:44,240 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:24:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:24:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1046638558, now seen corresponding path program 32 times [2022-04-05 05:24:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:24:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492630693] [2022-04-05 05:24:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:24:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:24:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:24:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 05:24:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-05 05:24:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 05:24:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 05:24:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 05:24:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 05:24:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 05:24:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-05 05:24:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-05 05:24:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-05 05:24:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-05 05:24:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-05 05:24:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-05 05:24:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 05:24:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-05 05:24:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-04-05 05:24:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-05 05:24:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-04-05 05:24:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-04-05 05:24:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-05 05:24:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-04-05 05:24:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-05 05:24:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-04-05 05:24:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-04-05 05:24:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-04-05 05:24:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:24:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 902 proven. 449 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-04-05 05:24:46,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:24:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492630693] [2022-04-05 05:24:46,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492630693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:24:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038874436] [2022-04-05 05:24:46,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:24:46,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:24:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:24:46,321 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) [2022-04-05 05:24:46,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-05 05:24:46,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:24:46,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:24:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 160 conjunts are in the unsatisfiable core [2022-04-05 05:24:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:24:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-04-05 05:24:49,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:24:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-04-05 05:24:55,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038874436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:24:55,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:24:55,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 58, 58] total 168 [2022-04-05 05:24:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101066704] [2022-04-05 05:24:55,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:24:55,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-04-05 05:24:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:24:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-04-05 05:24:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3531, Invalid=24525, Unknown=0, NotChecked=0, Total=28056 [2022-04-05 05:24:55,364 INFO L87 Difference]: Start difference. First operand 589 states and 750 transitions. Second operand has 168 states, 167 states have (on average 1.5089820359281436) internal successors, (252), 165 states have internal predecessors, (252), 77 states have call successors, (80), 4 states have call predecessors, (80), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-04-05 05:25:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:25:14,048 INFO L93 Difference]: Finished difference Result 781 states and 972 transitions. [2022-04-05 05:25:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-04-05 05:25:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 167 states have (on average 1.5089820359281436) internal successors, (252), 165 states have internal predecessors, (252), 77 states have call successors, (80), 4 states have call predecessors, (80), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) Word has length 215 [2022-04-05 05:25:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:25:14,050 INFO L225 Difference]: With dead ends: 781 [2022-04-05 05:25:14,050 INFO L226 Difference]: Without dead ends: 637 [2022-04-05 05:25:14,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 372 SyntacticMatches, 3 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24185 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=9185, Invalid=71187, Unknown=0, NotChecked=0, Total=80372 [2022-04-05 05:25:14,054 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 718 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 10870 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 12044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 10870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:25:14,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 339 Invalid, 12044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1174 Valid, 10870 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-05 05:25:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-04-05 05:25:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2022-04-05 05:25:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 446 states have (on average 1.062780269058296) internal successors, (474), 455 states have internal predecessors, (474), 170 states have call successors, (170), 19 states have call predecessors, (170), 18 states have return successors, (169), 160 states have call predecessors, (169), 169 states have call successors, (169) [2022-04-05 05:25:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 813 transitions. [2022-04-05 05:25:14,281 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 813 transitions. Word has length 215 [2022-04-05 05:25:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:25:14,281 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 813 transitions. [2022-04-05 05:25:14,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 167 states have (on average 1.5089820359281436) internal successors, (252), 165 states have internal predecessors, (252), 77 states have call successors, (80), 4 states have call predecessors, (80), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-04-05 05:25:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 813 transitions. [2022-04-05 05:25:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-05 05:25:14,283 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:25:14,283 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:25:14,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-05 05:25:14,499 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 [2022-04-05 05:25:14,499 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:25:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:25:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2068625434, now seen corresponding path program 33 times [2022-04-05 05:25:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:25:14,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619969390] [2022-04-05 05:25:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:25:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:25:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:25:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 05:25:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 05:25:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-05 05:25:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 05:25:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 05:25:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 05:25:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 05:25:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-05 05:25:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-05 05:25:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-05 05:25:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-05 05:25:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-05 05:25:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-05 05:25:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-05 05:25:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-05 05:25:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-05 05:25:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-04-05 05:25:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-04-05 05:25:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-05 05:25:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-04-05 05:25:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-04-05 05:25:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-04-05 05:25:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-04-05 05:25:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-04-05 05:25:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-05 05:25:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-04-05 05:25:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 977 proven. 480 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-05 05:25:16,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:25:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619969390] [2022-04-05 05:25:16,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619969390] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:25:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677762866] [2022-04-05 05:25:16,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:25:16,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:25:16,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:25:16,574 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) [2022-04-05 05:25:16,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-05 05:25:16,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-04-05 05:25:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:25:16,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-05 05:25:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:25:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 52 proven. 1405 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-05 05:25:20,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:25:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 52 proven. 1405 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-05 05:25:25,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677762866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:25:25,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:25:25,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 60, 60] total 174 [2022-04-05 05:25:25,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284005403] [2022-04-05 05:25:25,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:25:25,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-04-05 05:25:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:25:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-04-05 05:25:25,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3359, Invalid=26743, Unknown=0, NotChecked=0, Total=30102 [2022-04-05 05:25:25,934 INFO L87 Difference]: Start difference. First operand 635 states and 813 transitions. Second operand has 174 states, 173 states have (on average 1.5086705202312138) internal successors, (261), 171 states have internal predecessors, (261), 80 states have call successors, (83), 4 states have call predecessors, (83), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 05:25:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:25:44,911 INFO L93 Difference]: Finished difference Result 787 states and 977 transitions. [2022-04-05 05:25:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-05 05:25:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 173 states have (on average 1.5086705202312138) internal successors, (261), 171 states have internal predecessors, (261), 80 states have call successors, (83), 4 states have call predecessors, (83), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Word has length 223 [2022-04-05 05:25:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:25:44,915 INFO L225 Difference]: With dead ends: 787 [2022-04-05 05:25:44,915 INFO L226 Difference]: Without dead ends: 636 [2022-04-05 05:25:44,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 386 SyntacticMatches, 3 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17972 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=7287, Invalid=62145, Unknown=0, NotChecked=0, Total=69432 [2022-04-05 05:25:44,920 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 143 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 5883 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 6430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 5883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:25:44,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 275 Invalid, 6430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 5883 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-05 05:25:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-04-05 05:25:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2022-04-05 05:25:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 446 states have (on average 1.0605381165919283) internal successors, (473), 455 states have internal predecessors, (473), 170 states have call successors, (170), 19 states have call predecessors, (170), 18 states have return successors, (169), 160 states have call predecessors, (169), 169 states have call successors, (169) [2022-04-05 05:25:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 812 transitions. [2022-04-05 05:25:45,185 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 812 transitions. Word has length 223 [2022-04-05 05:25:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:25:45,185 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 812 transitions. [2022-04-05 05:25:45,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 173 states have (on average 1.5086705202312138) internal successors, (261), 171 states have internal predecessors, (261), 80 states have call successors, (83), 4 states have call predecessors, (83), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 05:25:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 812 transitions. [2022-04-05 05:25:45,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-04-05 05:25:45,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:25:45,187 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:25:45,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-05 05:25:45,403 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 [2022-04-05 05:25:45,403 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:25:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:25:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1863837884, now seen corresponding path program 34 times [2022-04-05 05:25:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:25:45,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362544345] [2022-04-05 05:25:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:25:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:25:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:25:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 05:25:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-05 05:25:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 05:25:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-05 05:25:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 05:25:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 05:25:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 05:25:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 05:25:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-05 05:25:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-05 05:25:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-05 05:25:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-05 05:25:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-05 05:25:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-05 05:25:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-04-05 05:25:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-05 05:25:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-04-05 05:25:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-05 05:25:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-04-05 05:25:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-04-05 05:25:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-04-05 05:25:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-04-05 05:25:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-04-05 05:25:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-05 05:25:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-04-05 05:25:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-04-05 05:25:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2785 backedges. 403 proven. 1082 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-05 05:25:46,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:25:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362544345] [2022-04-05 05:25:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362544345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:25:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577847888] [2022-04-05 05:25:46,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:25:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:25:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:25:46,292 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) [2022-04-05 05:25:46,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-05 05:25:46,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:25:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:25:46,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-05 05:25:46,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:25:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2785 backedges. 52 proven. 1433 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-05 05:25:47,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:25:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2785 backedges. 52 proven. 1433 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-05 05:25:48,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577847888] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:25:48,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:25:48,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-04-05 05:25:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94323753] [2022-04-05 05:25:48,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:25:48,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-04-05 05:25:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:25:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-04-05 05:25:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2128, Invalid=11678, Unknown=0, NotChecked=0, Total=13806 [2022-04-05 05:25:48,983 INFO L87 Difference]: Start difference. First operand 635 states and 812 transitions. Second operand has 118 states, 118 states have (on average 1.305084745762712) internal successors, (154), 115 states have internal predecessors, (154), 28 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-05 05:25:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:25:51,859 INFO L93 Difference]: Finished difference Result 651 states and 830 transitions. [2022-04-05 05:25:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-05 05:25:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.305084745762712) internal successors, (154), 115 states have internal predecessors, (154), 28 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 224 [2022-04-05 05:25:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:25:51,862 INFO L225 Difference]: With dead ends: 651 [2022-04-05 05:25:51,862 INFO L226 Difference]: Without dead ends: 649 [2022-04-05 05:25:51,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 442 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8858 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5397, Invalid=25755, Unknown=0, NotChecked=0, Total=31152 [2022-04-05 05:25:51,863 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 237 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:25:51,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 204 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 05:25:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-04-05 05:25:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 645. [2022-04-05 05:25:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 453 states have (on average 1.0596026490066226) internal successors, (480), 462 states have internal predecessors, (480), 172 states have call successors, (172), 20 states have call predecessors, (172), 19 states have return successors, (171), 162 states have call predecessors, (171), 171 states have call successors, (171) [2022-04-05 05:25:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 823 transitions. [2022-04-05 05:25:52,095 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 823 transitions. Word has length 224 [2022-04-05 05:25:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:25:52,096 INFO L478 AbstractCegarLoop]: Abstraction has 645 states and 823 transitions. [2022-04-05 05:25:52,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.305084745762712) internal successors, (154), 115 states have internal predecessors, (154), 28 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-05 05:25:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 823 transitions. [2022-04-05 05:25:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-05 05:25:52,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:25:52,098 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:25:52,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-05 05:25:52,314 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 [2022-04-05 05:25:52,315 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:25:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:25:52,315 INFO L85 PathProgramCache]: Analyzing trace with hash 769523294, now seen corresponding path program 35 times [2022-04-05 05:25:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:25:52,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416812451] [2022-04-05 05:25:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:25:52,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:25:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:25:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 05:25:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-05 05:25:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 05:25:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-05 05:25:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 05:25:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 05:25:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 05:25:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 05:25:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-05 05:25:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-05 05:25:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-05 05:25:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-05 05:25:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-05 05:25:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-05 05:25:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-04-05 05:25:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-05 05:25:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-04-05 05:25:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-05 05:25:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-04-05 05:25:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-04-05 05:25:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-04-05 05:25:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-04-05 05:25:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-04-05 05:25:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-05 05:25:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-04-05 05:25:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-04-05 05:25:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-04-05 05:25:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:25:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 1055 proven. 512 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-05 05:25:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:25:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416812451] [2022-04-05 05:25:54,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416812451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:25:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246324241] [2022-04-05 05:25:54,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:25:54,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:25:54,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:25:54,624 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) [2022-04-05 05:25:54,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-05 05:25:54,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-04-05 05:25:54,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:25:54,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-05 05:25:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:25:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 54 proven. 1513 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-05 05:25:57,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:26:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 54 proven. 1513 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-05 05:26:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246324241] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:26:02,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:26:02,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 62, 62] total 152 [2022-04-05 05:26:02,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797740543] [2022-04-05 05:26:02,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:26:02,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-04-05 05:26:02,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:26:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-04-05 05:26:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3157, Invalid=19795, Unknown=0, NotChecked=0, Total=22952 [2022-04-05 05:26:02,433 INFO L87 Difference]: Start difference. First operand 645 states and 823 transitions. Second operand has 152 states, 151 states have (on average 1.6026490066225165) internal successors, (242), 149 states have internal predecessors, (242), 83 states have call successors, (86), 4 states have call predecessors, (86), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-05 05:26:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:26:23,590 INFO L93 Difference]: Finished difference Result 893 states and 1115 transitions. [2022-04-05 05:26:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-04-05 05:26:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 151 states have (on average 1.6026490066225165) internal successors, (242), 149 states have internal predecessors, (242), 83 states have call successors, (86), 4 states have call predecessors, (86), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) Word has length 231 [2022-04-05 05:26:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:26:23,592 INFO L225 Difference]: With dead ends: 893 [2022-04-05 05:26:23,592 INFO L226 Difference]: Without dead ends: 739 [2022-04-05 05:26:23,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 427 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19649 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=9575, Invalid=66325, Unknown=0, NotChecked=0, Total=75900 [2022-04-05 05:26:23,596 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 794 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 11644 mSolverCounterSat, 1260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 12904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1260 IncrementalHoareTripleChecker+Valid, 11644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-04-05 05:26:23,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 356 Invalid, 12904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1260 Valid, 11644 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-04-05 05:26:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-04-05 05:26:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2022-04-05 05:26:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 516 states have (on average 1.058139534883721) internal successors, (546), 526 states have internal predecessors, (546), 200 states have call successors, (200), 21 states have call predecessors, (200), 20 states have return successors, (199), 189 states have call predecessors, (199), 199 states have call successors, (199) [2022-04-05 05:26:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 945 transitions. [2022-04-05 05:26:23,870 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 945 transitions. Word has length 231 [2022-04-05 05:26:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:26:23,870 INFO L478 AbstractCegarLoop]: Abstraction has 737 states and 945 transitions. [2022-04-05 05:26:23,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 151 states have (on average 1.6026490066225165) internal successors, (242), 149 states have internal predecessors, (242), 83 states have call successors, (86), 4 states have call predecessors, (86), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-05 05:26:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 945 transitions. [2022-04-05 05:26:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-05 05:26:23,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:26:23,873 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:26:23,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-05 05:26:24,073 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 [2022-04-05 05:26:24,073 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:26:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:26:24,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2081559142, now seen corresponding path program 36 times [2022-04-05 05:26:24,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:26:24,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053366667] [2022-04-05 05:26:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:26:24,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:26:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:26:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 05:26:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 05:26:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 05:26:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 05:26:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-05 05:26:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 05:26:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 05:26:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-05 05:26:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 05:26:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-05 05:26:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-05 05:26:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-05 05:26:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-04-05 05:26:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-04-05 05:26:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-05 05:26:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-04-05 05:26:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-05 05:26:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-04-05 05:26:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-04-05 05:26:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-04-05 05:26:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-04-05 05:26:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-04-05 05:26:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-05 05:26:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-04-05 05:26:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-04-05 05:26:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-04-05 05:26:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-04-05 05:26:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2022-04-05 05:26:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1136 proven. 545 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-04-05 05:26:26,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:26:26,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053366667] [2022-04-05 05:26:26,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053366667] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:26:26,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080974470] [2022-04-05 05:26:26,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:26:26,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:26:26,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:26:26,413 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) [2022-04-05 05:26:26,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-05 05:26:26,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-04-05 05:26:26,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:26:26,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-05 05:26:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:26:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 56 proven. 1625 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-04-05 05:26:28,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:26:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 56 proven. 1625 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-04-05 05:26:34,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080974470] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:26:34,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:26:34,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 64, 64] total 157 [2022-04-05 05:26:34,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132545685] [2022-04-05 05:26:34,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:26:34,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-04-05 05:26:34,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:26:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-04-05 05:26:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3370, Invalid=21122, Unknown=0, NotChecked=0, Total=24492 [2022-04-05 05:26:34,583 INFO L87 Difference]: Start difference. First operand 737 states and 945 transitions. Second operand has 157 states, 156 states have (on average 1.6025641025641026) internal successors, (250), 154 states have internal predecessors, (250), 86 states have call successors, (89), 4 states have call predecessors, (89), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-04-05 05:26:56,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:26:56,734 INFO L93 Difference]: Finished difference Result 989 states and 1239 transitions. [2022-04-05 05:26:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-04-05 05:26:56,735 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 156 states have (on average 1.6025641025641026) internal successors, (250), 154 states have internal predecessors, (250), 86 states have call successors, (89), 4 states have call predecessors, (89), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) Word has length 239 [2022-04-05 05:26:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:26:56,738 INFO L225 Difference]: With dead ends: 989 [2022-04-05 05:26:56,738 INFO L226 Difference]: Without dead ends: 828 [2022-04-05 05:26:56,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 442 SyntacticMatches, 4 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21202 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=10203, Invalid=70737, Unknown=0, NotChecked=0, Total=80940 [2022-04-05 05:26:56,742 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 825 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 12834 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 14137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 12834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:26:56,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 387 Invalid, 14137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 12834 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-05 05:26:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-04-05 05:26:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 827. [2022-04-05 05:26:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 577 states have (on average 1.0537261698440208) internal successors, (608), 587 states have internal predecessors, (608), 228 states have call successors, (228), 22 states have call predecessors, (228), 21 states have return successors, (227), 217 states have call predecessors, (227), 227 states have call successors, (227) [2022-04-05 05:26:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1063 transitions. [2022-04-05 05:26:57,068 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1063 transitions. Word has length 239 [2022-04-05 05:26:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:26:57,068 INFO L478 AbstractCegarLoop]: Abstraction has 827 states and 1063 transitions. [2022-04-05 05:26:57,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 156 states have (on average 1.6025641025641026) internal successors, (250), 154 states have internal predecessors, (250), 86 states have call successors, (89), 4 states have call predecessors, (89), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-04-05 05:26:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1063 transitions. [2022-04-05 05:26:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-04-05 05:26:57,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:26:57,071 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:26:57,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-05 05:26:57,291 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 [2022-04-05 05:26:57,292 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:26:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:26:57,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1800688418, now seen corresponding path program 37 times [2022-04-05 05:26:57,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:26:57,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001701373] [2022-04-05 05:26:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:26:57,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:26:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:26:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-05 05:26:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 05:26:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-05 05:26:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-05 05:26:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-05 05:26:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-05 05:26:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-05 05:26:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-05 05:26:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-05 05:26:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-05 05:26:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-05 05:26:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-04-05 05:26:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-04-05 05:26:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-04-05 05:26:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-04-05 05:26:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-05 05:26:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-04-05 05:26:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-05 05:26:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-04-05 05:26:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-04-05 05:26:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-04-05 05:26:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-05 05:26:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-04-05 05:26:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-04-05 05:26:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-04-05 05:26:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-04-05 05:26:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-04-05 05:26:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-05 05:26:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-04-05 05:26:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3423 backedges. 1220 proven. 579 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-04-05 05:26:59,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:26:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001701373] [2022-04-05 05:26:59,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001701373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:26:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748787438] [2022-04-05 05:26:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:26:59,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:26:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:26:59,754 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) [2022-04-05 05:26:59,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-05 05:26:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:26:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 125 conjunts are in the unsatisfiable core [2022-04-05 05:26:59,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:27:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3423 backedges. 58 proven. 1741 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-04-05 05:27:02,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:27:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3423 backedges. 58 proven. 1741 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-04-05 05:27:08,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748787438] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:27:08,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:27:08,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 66, 66] total 162 [2022-04-05 05:27:08,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058351150] [2022-04-05 05:27:08,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:27:08,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-04-05 05:27:08,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:27:08,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-04-05 05:27:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3590, Invalid=22492, Unknown=0, NotChecked=0, Total=26082 [2022-04-05 05:27:08,429 INFO L87 Difference]: Start difference. First operand 827 states and 1063 transitions. Second operand has 162 states, 161 states have (on average 1.6024844720496894) internal successors, (258), 159 states have internal predecessors, (258), 89 states have call successors, (92), 4 states have call predecessors, (92), 1 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-04-05 05:27:32,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:27:32,578 INFO L93 Difference]: Finished difference Result 1047 states and 1314 transitions. [2022-04-05 05:27:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-04-05 05:27:32,579 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 1.6024844720496894) internal successors, (258), 159 states have internal predecessors, (258), 89 states have call successors, (92), 4 states have call predecessors, (92), 1 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) Word has length 247 [2022-04-05 05:27:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:27:32,582 INFO L225 Difference]: With dead ends: 1047 [2022-04-05 05:27:32,582 INFO L226 Difference]: Without dead ends: 879 [2022-04-05 05:27:32,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 457 SyntacticMatches, 4 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22574 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=10851, Invalid=75291, Unknown=0, NotChecked=0, Total=86142 [2022-04-05 05:27:32,586 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 870 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 13644 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 15049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 13644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-05 05:27:32,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 388 Invalid, 15049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 13644 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-04-05 05:27:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-04-05 05:27:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 877. [2022-04-05 05:27:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 611 states have (on average 1.0523731587561376) internal successors, (643), 622 states have internal predecessors, (643), 244 states have call successors, (244), 22 states have call predecessors, (244), 21 states have return successors, (243), 232 states have call predecessors, (243), 243 states have call successors, (243) [2022-04-05 05:27:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1130 transitions. [2022-04-05 05:27:33,030 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1130 transitions. Word has length 247 [2022-04-05 05:27:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:27:33,030 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1130 transitions. [2022-04-05 05:27:33,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 1.6024844720496894) internal successors, (258), 159 states have internal predecessors, (258), 89 states have call successors, (92), 4 states have call predecessors, (92), 1 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-04-05 05:27:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1130 transitions. [2022-04-05 05:27:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-04-05 05:27:33,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:27:33,033 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:27:33,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-05 05:27:33,250 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 [2022-04-05 05:27:33,250 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:27:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:27:33,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1141832934, now seen corresponding path program 38 times [2022-04-05 05:27:33,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:27:33,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060057922] [2022-04-05 05:27:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:27:33,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:27:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:27:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 05:27:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-05 05:27:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 05:27:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-05 05:27:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-05 05:27:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-05 05:27:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-05 05:27:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-05 05:27:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-05 05:27:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-05 05:27:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 05:27:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-05 05:27:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-04-05 05:27:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-05 05:27:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-05 05:27:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-04-05 05:27:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-04-05 05:27:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-04-05 05:27:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-05 05:27:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-04-05 05:27:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-05 05:27:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-04-05 05:27:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-04-05 05:27:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-04-05 05:27:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-04-05 05:27:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-04-05 05:27:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-05 05:27:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2022-04-05 05:27:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2022-04-05 05:27:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-04-05 05:27:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:27:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3661 backedges. 1307 proven. 614 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-04-05 05:27:35,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:27:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060057922] [2022-04-05 05:27:35,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060057922] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:27:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735707288] [2022-04-05 05:27:35,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:27:35,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:27:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:27:35,996 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) [2022-04-05 05:27:35,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-05 05:27:36,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:27:36,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:27:36,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 190 conjunts are in the unsatisfiable core [2022-04-05 05:27:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:27:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3661 backedges. 60 proven. 1861 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-04-05 05:27:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:27:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3661 backedges. 60 proven. 1861 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-04-05 05:27:47,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735707288] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:27:47,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:27:47,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 68, 68] total 198 [2022-04-05 05:27:47,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983918282] [2022-04-05 05:27:47,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:27:47,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-04-05 05:27:47,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:27:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-04-05 05:27:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=34105, Unknown=0, NotChecked=0, Total=39006 [2022-04-05 05:27:47,465 INFO L87 Difference]: Start difference. First operand 877 states and 1130 transitions. Second operand has 198 states, 197 states have (on average 1.5076142131979695) internal successors, (297), 195 states have internal predecessors, (297), 92 states have call successors, (95), 4 states have call predecessors, (95), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-05 05:28:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:28:13,883 INFO L93 Difference]: Finished difference Result 1145 states and 1443 transitions. [2022-04-05 05:28:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-05 05:28:13,883 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 197 states have (on average 1.5076142131979695) internal successors, (297), 195 states have internal predecessors, (297), 92 states have call successors, (95), 4 states have call predecessors, (95), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) Word has length 255 [2022-04-05 05:28:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:28:13,888 INFO L225 Difference]: With dead ends: 1145 [2022-04-05 05:28:13,888 INFO L226 Difference]: Without dead ends: 974 [2022-04-05 05:28:13,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 442 SyntacticMatches, 3 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33277 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=12635, Invalid=98587, Unknown=0, NotChecked=0, Total=111222 [2022-04-05 05:28:13,910 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 904 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 15332 mSolverCounterSat, 1453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 16785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1453 IncrementalHoareTripleChecker+Valid, 15332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:28:13,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 404 Invalid, 16785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1453 Valid, 15332 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-04-05 05:28:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-04-05 05:28:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 973. [2022-04-05 05:28:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 676 states have (on average 1.0488165680473374) internal successors, (709), 687 states have internal predecessors, (709), 274 states have call successors, (274), 23 states have call predecessors, (274), 22 states have return successors, (273), 262 states have call predecessors, (273), 273 states have call successors, (273) [2022-04-05 05:28:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1256 transitions. [2022-04-05 05:28:14,319 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1256 transitions. Word has length 255 [2022-04-05 05:28:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:28:14,319 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1256 transitions. [2022-04-05 05:28:14,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 197 states have (on average 1.5076142131979695) internal successors, (297), 195 states have internal predecessors, (297), 92 states have call successors, (95), 4 states have call predecessors, (95), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-05 05:28:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1256 transitions. [2022-04-05 05:28:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-04-05 05:28:14,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:28:14,322 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:28:14,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-05 05:28:14,529 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 [2022-04-05 05:28:14,529 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:28:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:28:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash 496204638, now seen corresponding path program 39 times [2022-04-05 05:28:14,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:28:14,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188701769] [2022-04-05 05:28:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:28:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:28:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:28:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 05:28:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 05:28:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-05 05:28:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 05:28:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-05 05:28:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-05 05:28:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-05 05:28:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-05 05:28:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-05 05:28:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-05 05:28:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-05 05:28:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-05 05:28:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-05 05:28:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-05 05:28:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-04-05 05:28:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-04-05 05:28:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-04-05 05:28:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-04-05 05:28:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-04-05 05:28:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-05 05:28:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-04-05 05:28:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-04-05 05:28:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-04-05 05:28:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-04-05 05:28:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-04-05 05:28:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-05 05:28:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-04-05 05:28:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-04-05 05:28:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-04-05 05:28:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-04-05 05:28:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-04-05 05:28:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 1397 proven. 650 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-05 05:28:17,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:28:17,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188701769] [2022-04-05 05:28:17,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188701769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:28:17,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125061496] [2022-04-05 05:28:17,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:28:17,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:28:17,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:28:17,267 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) [2022-04-05 05:28:17,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-05 05:28:17,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2022-04-05 05:28:17,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:28:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-05 05:28:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:28:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 62 proven. 1985 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-05 05:28:22,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:28:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 62 proven. 1985 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-05 05:28:29,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125061496] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:28:29,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:28:29,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 70, 70] total 204 [2022-04-05 05:28:29,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790673174] [2022-04-05 05:28:29,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:28:29,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-04-05 05:28:29,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:28:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-04-05 05:28:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4614, Invalid=36798, Unknown=0, NotChecked=0, Total=41412 [2022-04-05 05:28:29,852 INFO L87 Difference]: Start difference. First operand 973 states and 1256 transitions. Second operand has 204 states, 203 states have (on average 1.5073891625615763) internal successors, (306), 201 states have internal predecessors, (306), 95 states have call successors, (98), 4 states have call predecessors, (98), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-05 05:28:56,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:28:56,859 INFO L93 Difference]: Finished difference Result 1107 states and 1389 transitions. [2022-04-05 05:28:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-05 05:28:56,860 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 203 states have (on average 1.5073891625615763) internal successors, (306), 201 states have internal predecessors, (306), 95 states have call successors, (98), 4 states have call predecessors, (98), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) Word has length 263 [2022-04-05 05:28:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:28:56,863 INFO L225 Difference]: With dead ends: 1107 [2022-04-05 05:28:56,863 INFO L226 Difference]: Without dead ends: 925 [2022-04-05 05:28:56,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 456 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24732 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=9977, Invalid=85195, Unknown=0, NotChecked=0, Total=95172 [2022-04-05 05:28:56,868 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 170 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 7282 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 8043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 7282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:28:56,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 300 Invalid, 8043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 7282 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-05 05:28:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-04-05 05:28:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2022-04-05 05:28:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 643 states have (on average 1.0497667185069985) internal successors, (675), 654 states have internal predecessors, (675), 259 states have call successors, (259), 22 states have call predecessors, (259), 21 states have return successors, (258), 247 states have call predecessors, (258), 258 states have call successors, (258) [2022-04-05 05:28:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1192 transitions. [2022-04-05 05:28:57,248 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1192 transitions. Word has length 263 [2022-04-05 05:28:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:28:57,248 INFO L478 AbstractCegarLoop]: Abstraction has 924 states and 1192 transitions. [2022-04-05 05:28:57,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 203 states have (on average 1.5073891625615763) internal successors, (306), 201 states have internal predecessors, (306), 95 states have call successors, (98), 4 states have call predecessors, (98), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-05 05:28:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1192 transitions. [2022-04-05 05:28:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-04-05 05:28:57,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:28:57,251 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:28:57,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-05 05:28:57,451 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 [2022-04-05 05:28:57,452 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:28:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:28:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1100289912, now seen corresponding path program 40 times [2022-04-05 05:28:57,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:28:57,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982914992] [2022-04-05 05:28:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:28:57,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:28:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:28:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-05 05:28:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 05:28:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 05:28:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 05:28:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 05:28:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 05:28:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-05 05:28:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-05 05:28:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-05 05:28:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-05 05:28:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-05 05:28:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-05 05:28:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 05:28:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-05 05:28:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-04-05 05:28:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-05 05:28:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-04-05 05:28:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-04-05 05:28:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-05 05:28:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-04-05 05:28:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-05 05:28:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-04-05 05:28:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-04-05 05:28:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-04-05 05:28:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-05 05:28:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-04-05 05:28:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2022-04-05 05:28:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2022-04-05 05:28:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-04-05 05:28:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-04-05 05:28:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-05 05:28:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:28:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 558 proven. 1522 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-05 05:28:58,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:28:58,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982914992] [2022-04-05 05:28:58,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982914992] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:28:58,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846339775] [2022-04-05 05:28:58,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:28:58,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:28:58,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:28:58,715 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) [2022-04-05 05:28:58,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-05 05:28:58,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:28:58,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:28:58,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-05 05:28:58,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 62 proven. 2018 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-05 05:29:00,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 62 proven. 2018 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-05 05:29:02,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846339775] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:02,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:02,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-05 05:29:02,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13702518] [2022-04-05 05:29:02,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:02,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-04-05 05:29:02,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-04-05 05:29:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2918, Invalid=15988, Unknown=0, NotChecked=0, Total=18906 [2022-04-05 05:29:02,329 INFO L87 Difference]: Start difference. First operand 924 states and 1192 transitions. Second operand has 138 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 135 states have internal predecessors, (179), 33 states have call successors, (36), 4 states have call predecessors, (36), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-05 05:29:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:06,229 INFO L93 Difference]: Finished difference Result 949 states and 1222 transitions. [2022-04-05 05:29:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-05 05:29:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 135 states have internal predecessors, (179), 33 states have call successors, (36), 4 states have call predecessors, (36), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 264 [2022-04-05 05:29:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:06,234 INFO L225 Difference]: With dead ends: 949 [2022-04-05 05:29:06,234 INFO L226 Difference]: Without dead ends: 947 [2022-04-05 05:29:06,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 522 SyntacticMatches, 3 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12178 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7427, Invalid=35215, Unknown=0, NotChecked=0, Total=42642 [2022-04-05 05:29:06,239 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 356 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3637 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 4447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 3637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:06,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 249 Invalid, 4447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 3637 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-05 05:29:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-04-05 05:29:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 943. [2022-04-05 05:29:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 656 states have (on average 1.048780487804878) internal successors, (688), 667 states have internal predecessors, (688), 264 states have call successors, (264), 23 states have call predecessors, (264), 22 states have return successors, (263), 252 states have call predecessors, (263), 263 states have call successors, (263) [2022-04-05 05:29:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1215 transitions. [2022-04-05 05:29:06,846 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1215 transitions. Word has length 264 [2022-04-05 05:29:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:06,846 INFO L478 AbstractCegarLoop]: Abstraction has 943 states and 1215 transitions. [2022-04-05 05:29:06,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 135 states have internal predecessors, (179), 33 states have call successors, (36), 4 states have call predecessors, (36), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-05 05:29:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1215 transitions. [2022-04-05 05:29:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-04-05 05:29:06,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:06,851 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:06,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-05 05:29:07,051 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 [2022-04-05 05:29:07,051 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1752303462, now seen corresponding path program 41 times [2022-04-05 05:29:07,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:07,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999943896] [2022-04-05 05:29:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:07,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-05 05:29:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-05 05:29:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 05:29:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 05:29:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 05:29:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-05 05:29:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-05 05:29:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-05 05:29:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-05 05:29:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-05 05:29:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-05 05:29:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-05 05:29:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 05:29:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-05 05:29:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-04-05 05:29:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-05 05:29:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-04-05 05:29:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-04-05 05:29:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-05 05:29:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-04-05 05:29:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-05 05:29:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-04-05 05:29:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-04-05 05:29:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-04-05 05:29:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-05 05:29:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-04-05 05:29:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2022-04-05 05:29:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2022-04-05 05:29:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-04-05 05:29:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-04-05 05:29:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-05 05:29:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-04-05 05:29:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4161 backedges. 1490 proven. 687 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-04-05 05:29:10,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999943896] [2022-04-05 05:29:10,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999943896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906923971] [2022-04-05 05:29:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:29:10,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:10,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:10,476 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) [2022-04-05 05:29:10,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-05 05:29:10,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2022-04-05 05:29:10,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:29:10,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-05 05:29:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4161 backedges. 64 proven. 2113 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-04-05 05:29:13,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4161 backedges. 64 proven. 2113 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-04-05 05:29:21,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906923971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:21,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:21,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 72, 72] total 177 [2022-04-05 05:29:21,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759557426] [2022-04-05 05:29:21,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:21,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-04-05 05:29:21,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-04-05 05:29:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4292, Invalid=26860, Unknown=0, NotChecked=0, Total=31152 [2022-04-05 05:29:21,154 INFO L87 Difference]: Start difference. First operand 943 states and 1215 transitions. Second operand has 177 states, 176 states have (on average 1.6022727272727273) internal successors, (282), 174 states have internal predecessors, (282), 98 states have call successors, (101), 4 states have call predecessors, (101), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-05 05:29:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:49,855 INFO L93 Difference]: Finished difference Result 1233 states and 1556 transitions. [2022-04-05 05:29:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-04-05 05:29:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 176 states have (on average 1.6022727272727273) internal successors, (282), 174 states have internal predecessors, (282), 98 states have call successors, (101), 4 states have call predecessors, (101), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) Word has length 271 [2022-04-05 05:29:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:49,859 INFO L225 Difference]: With dead ends: 1233 [2022-04-05 05:29:49,859 INFO L226 Difference]: Without dead ends: 1052 [2022-04-05 05:29:49,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 502 SyntacticMatches, 4 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26597 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=12915, Invalid=89805, Unknown=0, NotChecked=0, Total=102720 [2022-04-05 05:29:49,863 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 1007 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 15609 mSolverCounterSat, 1714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 17323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1714 IncrementalHoareTripleChecker+Valid, 15609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:49,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 401 Invalid, 17323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1714 Valid, 15609 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-04-05 05:29:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-04-05 05:29:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1050. [2022-04-05 05:29:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 729 states have (on average 1.0480109739369) internal successors, (764), 741 states have internal predecessors, (764), 297 states have call successors, (297), 24 states have call predecessors, (297), 23 states have return successors, (296), 284 states have call predecessors, (296), 296 states have call successors, (296) [2022-04-05 05:29:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1357 transitions. [2022-04-05 05:29:50,317 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1357 transitions. Word has length 271 [2022-04-05 05:29:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:50,318 INFO L478 AbstractCegarLoop]: Abstraction has 1050 states and 1357 transitions. [2022-04-05 05:29:50,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 176 states have (on average 1.6022727272727273) internal successors, (282), 174 states have internal predecessors, (282), 98 states have call successors, (101), 4 states have call predecessors, (101), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-05 05:29:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1357 transitions. [2022-04-05 05:29:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-04-05 05:29:50,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:50,321 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:50,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-05 05:29:50,521 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 [2022-04-05 05:29:50,521 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash -178427426, now seen corresponding path program 42 times [2022-04-05 05:29:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:50,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359812838] [2022-04-05 05:29:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-05 05:29:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-05 05:29:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 05:29:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 05:29:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-05 05:29:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 05:29:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-05 05:29:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-05 05:29:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-05 05:29:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-05 05:29:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-05 05:29:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-05 05:29:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-05 05:29:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-05 05:29:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-05 05:29:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-04-05 05:29:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-04-05 05:29:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-05 05:29:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-04-05 05:29:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-04-05 05:29:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-04-05 05:29:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-04-05 05:29:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-04-05 05:29:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-05 05:29:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-04-05 05:29:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-04-05 05:29:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-04-05 05:29:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-04-05 05:29:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2022-04-05 05:29:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-05 05:29:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2022-04-05 05:29:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2022-04-05 05:29:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2022-04-05 05:29:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4423 backedges. 1586 proven. 725 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-05 05:29:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359812838] [2022-04-05 05:29:53,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359812838] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103725430] [2022-04-05 05:29:53,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:29:53,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:53,463 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) [2022-04-05 05:29:53,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-05 05:29:53,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-05 05:29:53,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:29:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-05 05:29:53,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4423 backedges. 66 proven. 2245 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-05 05:29:58,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4423 backedges. 66 proven. 2245 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-05 05:30:06,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103725430] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:06,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:06,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 74, 74] total 216 [2022-04-05 05:30:06,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567123919] [2022-04-05 05:30:06,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:06,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2022-04-05 05:30:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2022-04-05 05:30:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5172, Invalid=41268, Unknown=0, NotChecked=0, Total=46440 [2022-04-05 05:30:06,581 INFO L87 Difference]: Start difference. First operand 1050 states and 1357 transitions. Second operand has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 213 states have internal predecessors, (324), 101 states have call successors, (104), 4 states have call predecessors, (104), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-04-05 05:30:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:35,520 INFO L93 Difference]: Finished difference Result 1243 states and 1564 transitions. [2022-04-05 05:30:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-05 05:30:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 213 states have internal predecessors, (324), 101 states have call successors, (104), 4 states have call predecessors, (104), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Word has length 279 [2022-04-05 05:30:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:35,532 INFO L225 Difference]: With dead ends: 1243 [2022-04-05 05:30:35,532 INFO L226 Difference]: Without dead ends: 1051 [2022-04-05 05:30:35,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 484 SyntacticMatches, 3 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27737 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=11172, Invalid=95430, Unknown=0, NotChecked=0, Total=106602 [2022-04-05 05:30:35,537 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 147 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 7123 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 7961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 7123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:35,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 277 Invalid, 7961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 7123 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-05 05:30:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-04-05 05:30:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1050. [2022-04-05 05:30:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 729 states have (on average 1.046639231824417) internal successors, (763), 741 states have internal predecessors, (763), 297 states have call successors, (297), 24 states have call predecessors, (297), 23 states have return successors, (296), 284 states have call predecessors, (296), 296 states have call successors, (296) [2022-04-05 05:30:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1356 transitions. [2022-04-05 05:30:35,992 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1356 transitions. Word has length 279 [2022-04-05 05:30:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:35,992 INFO L478 AbstractCegarLoop]: Abstraction has 1050 states and 1356 transitions. [2022-04-05 05:30:35,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 213 states have internal predecessors, (324), 101 states have call successors, (104), 4 states have call predecessors, (104), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-04-05 05:30:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1356 transitions. [2022-04-05 05:30:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-04-05 05:30:35,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:35,995 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:36,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:36,211 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 [2022-04-05 05:30:36,211 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1751563512, now seen corresponding path program 43 times [2022-04-05 05:30:36,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:36,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190028540] [2022-04-05 05:30:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:36,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-05 05:30:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 05:30:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-05 05:30:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 05:30:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 05:30:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 05:30:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 05:30:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-05 05:30:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-05 05:30:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-05 05:30:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-05 05:30:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-05 05:30:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-05 05:30:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-04-05 05:30:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-05 05:30:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-04-05 05:30:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-05 05:30:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-04-05 05:30:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-04-05 05:30:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-04-05 05:30:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-04-05 05:30:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-04-05 05:30:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-05 05:30:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-04-05 05:30:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-04-05 05:30:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-04-05 05:30:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-04-05 05:30:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-04-05 05:30:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-05 05:30:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2022-04-05 05:30:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2022-04-05 05:30:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-04-05 05:30:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-04-05 05:30:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4458 backedges. 627 proven. 1719 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-05 05:30:37,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:37,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190028540] [2022-04-05 05:30:37,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190028540] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:37,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260268743] [2022-04-05 05:30:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:30:37,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:37,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:37,513 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) [2022-04-05 05:30:37,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-05 05:30:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-05 05:30:37,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4458 backedges. 66 proven. 2280 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-05 05:30:39,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4458 backedges. 66 proven. 2280 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-05 05:30:41,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260268743] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:41,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:41,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-04-05 05:30:41,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535769671] [2022-04-05 05:30:41,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:41,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-04-05 05:30:41,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-04-05 05:30:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3269, Invalid=17901, Unknown=0, NotChecked=0, Total=21170 [2022-04-05 05:30:41,282 INFO L87 Difference]: Start difference. First operand 1050 states and 1356 transitions. Second operand has 146 states, 146 states have (on average 1.2945205479452055) internal successors, (189), 143 states have internal predecessors, (189), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 05:30:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:45,373 INFO L93 Difference]: Finished difference Result 1066 states and 1374 transitions. [2022-04-05 05:30:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-05 05:30:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.2945205479452055) internal successors, (189), 143 states have internal predecessors, (189), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 280 [2022-04-05 05:30:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:45,377 INFO L225 Difference]: With dead ends: 1066 [2022-04-05 05:30:45,377 INFO L226 Difference]: Without dead ends: 1064 [2022-04-05 05:30:45,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 554 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13653 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8330, Invalid=39412, Unknown=0, NotChecked=0, Total=47742 [2022-04-05 05:30:45,379 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 363 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3928 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 4774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 3928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:45,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 264 Invalid, 4774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 3928 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 05:30:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-04-05 05:30:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1060. [2022-04-05 05:30:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 736 states have (on average 1.046195652173913) internal successors, (770), 748 states have internal predecessors, (770), 299 states have call successors, (299), 25 states have call predecessors, (299), 24 states have return successors, (298), 286 states have call predecessors, (298), 298 states have call successors, (298) [2022-04-05 05:30:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1367 transitions. [2022-04-05 05:30:45,860 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1367 transitions. Word has length 280 [2022-04-05 05:30:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:45,860 INFO L478 AbstractCegarLoop]: Abstraction has 1060 states and 1367 transitions. [2022-04-05 05:30:45,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.2945205479452055) internal successors, (189), 143 states have internal predecessors, (189), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 05:30:45,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1367 transitions. [2022-04-05 05:30:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-04-05 05:30:45,863 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:45,863 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:45,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:46,064 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 [2022-04-05 05:30:46,064 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash -922956262, now seen corresponding path program 44 times [2022-04-05 05:30:46,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:46,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789870504] [2022-04-05 05:30:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-05 05:30:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-05 05:30:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-05 05:30:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-05 05:30:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 05:30:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-05 05:30:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 05:30:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-05 05:30:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-05 05:30:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-05 05:30:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-05 05:30:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-05 05:30:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-05 05:30:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-04-05 05:30:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-05 05:30:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-04-05 05:30:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-05 05:30:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-04-05 05:30:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-04-05 05:30:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-04-05 05:30:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-04-05 05:30:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-04-05 05:30:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-05 05:30:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-04-05 05:30:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-04-05 05:30:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-04-05 05:30:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-04-05 05:30:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-04-05 05:30:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-05 05:30:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2022-04-05 05:30:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2022-04-05 05:30:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-04-05 05:30:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-04-05 05:30:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2022-04-05 05:30:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 1685 proven. 764 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-04-05 05:30:49,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789870504] [2022-04-05 05:30:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789870504] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787457183] [2022-04-05 05:30:49,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:30:49,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:49,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:49,156 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) [2022-04-05 05:30:49,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-05 05:30:49,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:30:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:30:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 214 conjunts are in the unsatisfiable core [2022-04-05 05:30:49,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 68 proven. 2381 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-04-05 05:30:54,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:31:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 68 proven. 2381 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-04-05 05:31:02,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787457183] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:31:02,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:31:02,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 76, 76] total 222 [2022-04-05 05:31:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649061986] [2022-04-05 05:31:02,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:31:02,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 222 states [2022-04-05 05:31:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:31:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2022-04-05 05:31:02,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6159, Invalid=42903, Unknown=0, NotChecked=0, Total=49062 [2022-04-05 05:31:02,825 INFO L87 Difference]: Start difference. First operand 1060 states and 1367 transitions. Second operand has 222 states, 221 states have (on average 1.506787330316742) internal successors, (333), 219 states have internal predecessors, (333), 104 states have call successors, (107), 4 states have call predecessors, (107), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-05 05:31:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:31:34,651 INFO L93 Difference]: Finished difference Result 1366 states and 1725 transitions. [2022-04-05 05:31:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-04-05 05:31:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 222 states, 221 states have (on average 1.506787330316742) internal successors, (333), 219 states have internal predecessors, (333), 104 states have call successors, (107), 4 states have call predecessors, (107), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) Word has length 287 [2022-04-05 05:31:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:31:34,656 INFO L225 Difference]: With dead ends: 1366 [2022-04-05 05:31:34,656 INFO L226 Difference]: Without dead ends: 1171 [2022-04-05 05:31:34,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 498 SyntacticMatches, 3 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42170 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=15791, Invalid=123711, Unknown=0, NotChecked=0, Total=139502 [2022-04-05 05:31:34,661 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 1101 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 18092 mSolverCounterSat, 1883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 19975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1883 IncrementalHoareTripleChecker+Valid, 18092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:31:34,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 413 Invalid, 19975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1883 Valid, 18092 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-04-05 05:31:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-04-05 05:31:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1170. [2022-04-05 05:31:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 811 states have (on average 1.0456226880394575) internal successors, (848), 823 states have internal predecessors, (848), 333 states have call successors, (333), 26 states have call predecessors, (333), 25 states have return successors, (332), 320 states have call predecessors, (332), 332 states have call successors, (332) [2022-04-05 05:31:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1513 transitions. [2022-04-05 05:31:35,207 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1513 transitions. Word has length 287 [2022-04-05 05:31:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:31:35,207 INFO L478 AbstractCegarLoop]: Abstraction has 1170 states and 1513 transitions. [2022-04-05 05:31:35,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 222 states, 221 states have (on average 1.506787330316742) internal successors, (333), 219 states have internal predecessors, (333), 104 states have call successors, (107), 4 states have call predecessors, (107), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-05 05:31:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1513 transitions. [2022-04-05 05:31:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-04-05 05:31:35,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:31:35,211 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:31:35,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-05 05:31:35,411 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 [2022-04-05 05:31:35,411 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:31:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:31:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1255241822, now seen corresponding path program 45 times [2022-04-05 05:31:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:31:35,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217104711] [2022-04-05 05:31:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:31:35,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:31:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:31:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-05 05:31:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-05 05:31:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-05 05:31:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-05 05:31:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-05 05:31:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 05:31:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-05 05:31:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 05:31:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-05 05:31:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-05 05:31:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-05 05:31:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-04-05 05:31:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-04-05 05:31:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-05 05:31:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-04-05 05:31:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-05 05:31:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-04-05 05:31:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-04-05 05:31:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-04-05 05:31:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-04-05 05:31:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-04-05 05:31:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-05 05:31:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-04-05 05:31:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-04-05 05:31:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-04-05 05:31:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-04-05 05:31:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2022-04-05 05:31:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-05 05:31:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-04-05 05:31:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-04-05 05:31:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2022-04-05 05:31:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2022-04-05 05:31:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-04-05 05:31:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2022-04-05 05:31:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2022-04-05 05:31:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 1787 proven. 804 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-04-05 05:31:38,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:31:38,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217104711] [2022-04-05 05:31:38,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217104711] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:31:38,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996783236] [2022-04-05 05:31:38,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:31:38,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:31:38,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:31:38,678 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) [2022-04-05 05:31:38,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-05 05:31:38,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-04-05 05:31:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:31:38,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-05 05:31:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:31:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 70 proven. 2521 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-04-05 05:31:44,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:31:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 70 proven. 2521 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-04-05 05:31:53,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996783236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:31:53,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:31:53,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 78, 78] total 228 [2022-04-05 05:31:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944894555] [2022-04-05 05:31:53,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:31:53,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-04-05 05:31:53,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:31:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-04-05 05:31:53,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5762, Invalid=45994, Unknown=0, NotChecked=0, Total=51756 [2022-04-05 05:31:53,153 INFO L87 Difference]: Start difference. First operand 1170 states and 1513 transitions. Second operand has 228 states, 227 states have (on average 1.5066079295154184) internal successors, (342), 225 states have internal predecessors, (342), 107 states have call successors, (110), 4 states have call predecessors, (110), 1 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106)