/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:09:56,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:09:56,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:09:56,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:09:56,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:09:56,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:09:56,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:09:56,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:09:56,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:09:56,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:09:56,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:09:56,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:09:56,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:09:56,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:09:56,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:09:56,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:09:56,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:09:56,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:09:56,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:09:56,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:09:56,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:09:56,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:09:56,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:09:56,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:09:56,434 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:09:56,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:09:56,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:09:56,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:09:56,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:09:56,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:09:56,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:09:56,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:09:56,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:09:56,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:09:56,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:09:56,437 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:09:56,438 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:09:56,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:09:56,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:09:56,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:09:56,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:09:56,636 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:09:56,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-02-23 16:09:56,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eefb6f20e/ffa0ab5c240040deb841aa9c667f2158/FLAG4f501da77 [2022-02-23 16:09:57,053 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:09:57,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-02-23 16:09:57,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eefb6f20e/ffa0ab5c240040deb841aa9c667f2158/FLAG4f501da77 [2022-02-23 16:09:57,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eefb6f20e/ffa0ab5c240040deb841aa9c667f2158 [2022-02-23 16:09:57,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:09:57,084 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:09:57,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:09:57,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:09:57,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:09:57,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6692fcff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57, skipping insertion in model container [2022-02-23 16:09:57,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:09:57,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:09:57,255 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-new/count_by_nondet.i[891,904] [2022-02-23 16:09:57,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:09:57,281 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:09:57,289 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-new/count_by_nondet.i[891,904] [2022-02-23 16:09:57,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:09:57,324 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:09:57,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57 WrapperNode [2022-02-23 16:09:57,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:09:57,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:09:57,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:09:57,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:09:57,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:09:57,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:09:57,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:09:57,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:09:57,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:09:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:09:57,382 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) [2022-02-23 16:09:57,390 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 [2022-02-23 16:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:09:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 16:09:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:09:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:09:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:09:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:09:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:09:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:09:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:09:57,463 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:09:57,464 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:09:57,545 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:09:57,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:09:57,550 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 16:09:57,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:09:57 BoogieIcfgContainer [2022-02-23 16:09:57,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:09:57,552 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:09:57,552 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:09:57,552 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:09:57,554 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:09:57" (1/1) ... [2022-02-23 16:09:57,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:09:57 BasicIcfg [2022-02-23 16:09:57,565 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:09:57,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:09:57,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:09:57,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:09:57,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:09:57" (1/4) ... [2022-02-23 16:09:57,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f2795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:09:57, skipping insertion in model container [2022-02-23 16:09:57,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:09:57" (2/4) ... [2022-02-23 16:09:57,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f2795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:09:57, skipping insertion in model container [2022-02-23 16:09:57,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:09:57" (3/4) ... [2022-02-23 16:09:57,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f2795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:09:57, skipping insertion in model container [2022-02-23 16:09:57,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:09:57" (4/4) ... [2022-02-23 16:09:57,570 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.iJordan [2022-02-23 16:09:57,573 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:09:57,573 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:09:57,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:09:57,624 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 16:09:57,625 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:09:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-02-23 16:09:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 16:09:57,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:09:57,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:09:57,640 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:09:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:09:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 180216049, now seen corresponding path program 1 times [2022-02-23 16:09:57,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:09:57,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331947766] [2022-02-23 16:09:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:09:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:09:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:57,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:09:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:57,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:09:57,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331947766] [2022-02-23 16:09:57,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331947766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:09:57,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:09:57,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:09:57,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870116860] [2022-02-23 16:09:57,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:09:57,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:09:57,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:09:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:09:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:09:57,811 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:09:57,874 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-23 16:09:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:09:57,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 16:09:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:09:57,885 INFO L225 Difference]: With dead ends: 24 [2022-02-23 16:09:57,885 INFO L226 Difference]: Without dead ends: 15 [2022-02-23 16:09:57,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 16:09:57,890 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:09:57,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:09:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-23 16:09:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-02-23 16:09:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-23 16:09:57,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-02-23 16:09:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:09:57,915 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-23 16:09:57,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-23 16:09:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 16:09:57,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:09:57,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:09:57,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:09:57,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:09:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:09:57,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1966995474, now seen corresponding path program 1 times [2022-02-23 16:09:57,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:09:57,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417823375] [2022-02-23 16:09:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:09:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:09:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:09:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:58,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:09:58,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417823375] [2022-02-23 16:09:58,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417823375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:09:58,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95615116] [2022-02-23 16:09:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:09:58,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:09:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:09:58,010 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) [2022-02-23 16:09:58,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:09:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 16:09:58,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:09:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:58,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:09:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:58,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95615116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:09:58,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:09:58,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-02-23 16:09:58,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079184822] [2022-02-23 16:09:58,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:09:58,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 16:09:58,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:09:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 16:09:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 16:09:58,192 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:09:58,233 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-02-23 16:09:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 16:09:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-23 16:09:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:09:58,238 INFO L225 Difference]: With dead ends: 16 [2022-02-23 16:09:58,238 INFO L226 Difference]: Without dead ends: 16 [2022-02-23 16:09:58,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:09:58,243 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:09:58,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:09:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-23 16:09:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-23 16:09:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-02-23 16:09:58,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-02-23 16:09:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:09:58,249 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-02-23 16:09:58,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-02-23 16:09:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 16:09:58,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:09:58,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:09:58,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:09:58,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:09:58,467 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:09:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:09:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash 442000299, now seen corresponding path program 2 times [2022-02-23 16:09:58,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:09:58,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154060075] [2022-02-23 16:09:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:09:58,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:09:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:58,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:09:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:58,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:09:58,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154060075] [2022-02-23 16:09:58,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154060075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:09:58,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231925178] [2022-02-23 16:09:58,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:09:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:09:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:09:58,525 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) [2022-02-23 16:09:58,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:09:58,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:09:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:09:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 16:09:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:09:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:58,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:09:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:58,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231925178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:09:58,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:09:58,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-23 16:09:58,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754394060] [2022-02-23 16:09:58,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:09:58,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 16:09:58,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:09:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 16:09:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-23 16:09:58,683 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 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) [2022-02-23 16:09:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:09:58,779 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-02-23 16:09:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 16:09:58,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 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 15 [2022-02-23 16:09:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:09:58,780 INFO L225 Difference]: With dead ends: 31 [2022-02-23 16:09:58,780 INFO L226 Difference]: Without dead ends: 25 [2022-02-23 16:09:58,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-02-23 16:09:58,781 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:09:58,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:09:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-23 16:09:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-02-23 16:09:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-02-23 16:09:58,784 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2022-02-23 16:09:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:09:58,784 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-02-23 16:09:58,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 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) [2022-02-23 16:09:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-02-23 16:09:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 16:09:58,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:09:58,785 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:09:58,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:09:58,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 16:09:58,992 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:09:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:09:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1322263071, now seen corresponding path program 3 times [2022-02-23 16:09:58,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:09:58,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042011014] [2022-02-23 16:09:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:09:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:09:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:59,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:09:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:09:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:59,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:09:59,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042011014] [2022-02-23 16:09:59,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042011014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:09:59,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112976216] [2022-02-23 16:09:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:09:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:09:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:09:59,113 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) [2022-02-23 16:09:59,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:09:59,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-23 16:09:59,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:09:59,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 16:09:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:09:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:59,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:09:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:09:59,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112976216] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:09:59,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:09:59,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-02-23 16:09:59,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618855341] [2022-02-23 16:09:59,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:09:59,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 16:09:59,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:09:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 16:09:59,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-02-23 16:09:59,346 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 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) [2022-02-23 16:09:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:09:59,580 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-02-23 16:09:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 16:09:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 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 23 [2022-02-23 16:09:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:09:59,581 INFO L225 Difference]: With dead ends: 51 [2022-02-23 16:09:59,581 INFO L226 Difference]: Without dead ends: 41 [2022-02-23 16:09:59,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 16:09:59,583 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:09:59,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:09:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-23 16:09:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-02-23 16:09:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:09:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-02-23 16:09:59,586 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 23 [2022-02-23 16:09:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:09:59,586 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-02-23 16:09:59,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 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) [2022-02-23 16:09:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-02-23 16:09:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 16:09:59,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:09:59,587 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:09:59,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 16:09:59,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:09:59,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:09:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:09:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash 467698439, now seen corresponding path program 4 times [2022-02-23 16:09:59,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:09:59,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079555062] [2022-02-23 16:09:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:09:59,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:09:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:00,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:10:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:00,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:10:00,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079555062] [2022-02-23 16:10:00,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079555062] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:10:00,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59049383] [2022-02-23 16:10:00,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:10:00,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:00,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:10:00,046 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) [2022-02-23 16:10:00,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:10:00,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:10:00,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:10:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 16:10:00,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:10:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:00,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:10:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:00,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59049383] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:10:00,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:10:00,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-02-23 16:10:00,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486773788] [2022-02-23 16:10:00,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:10:00,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-23 16:10:00,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:10:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-23 16:10:00,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 16:10:00,562 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 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) [2022-02-23 16:10:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:10:01,136 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2022-02-23 16:10:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 16:10:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 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 39 [2022-02-23 16:10:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:10:01,137 INFO L225 Difference]: With dead ends: 91 [2022-02-23 16:10:01,137 INFO L226 Difference]: Without dead ends: 73 [2022-02-23 16:10:01,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1544, Invalid=3286, Unknown=0, NotChecked=0, Total=4830 [2022-02-23 16:10:01,140 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:10:01,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 48 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:10:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-23 16:10:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-02-23 16:10:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:10:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-02-23 16:10:01,144 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 39 [2022-02-23 16:10:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:10:01,144 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-02-23 16:10:01,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 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) [2022-02-23 16:10:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-02-23 16:10:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-23 16:10:01,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:10:01,146 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:10:01,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 16:10:01,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:01,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:10:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:10:01,360 INFO L85 PathProgramCache]: Analyzing trace with hash 355783895, now seen corresponding path program 5 times [2022-02-23 16:10:01,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:10:01,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88595743] [2022-02-23 16:10:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:10:01,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:10:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:10:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:01,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:10:01,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88595743] [2022-02-23 16:10:01,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88595743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:10:01,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302381474] [2022-02-23 16:10:01,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:10:01,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:10:01,875 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) [2022-02-23 16:10:01,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 16:10:01,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-02-23 16:10:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:10:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 16:10:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:10:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:02,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:10:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:03,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302381474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:10:03,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:10:03,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-02-23 16:10:03,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359571944] [2022-02-23 16:10:03,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:10:03,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-23 16:10:03,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:10:03,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-23 16:10:03,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-02-23 16:10:03,181 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 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) [2022-02-23 16:10:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:10:04,801 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2022-02-23 16:10:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-23 16:10:04,801 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 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 71 [2022-02-23 16:10:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:10:04,802 INFO L225 Difference]: With dead ends: 171 [2022-02-23 16:10:04,802 INFO L226 Difference]: Without dead ends: 137 [2022-02-23 16:10:04,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6136, Invalid=11686, Unknown=0, NotChecked=0, Total=17822 [2022-02-23 16:10:04,807 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 301 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:10:04,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 43 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:10:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-23 16:10:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-02-23 16:10:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:10:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-02-23 16:10:04,820 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 71 [2022-02-23 16:10:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:10:04,821 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-02-23 16:10:04,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 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) [2022-02-23 16:10:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-02-23 16:10:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-23 16:10:04,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:10:04,824 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:10:04,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 16:10:05,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:05,024 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:10:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:10:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1512814711, now seen corresponding path program 6 times [2022-02-23 16:10:05,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:10:05,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259253598] [2022-02-23 16:10:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:10:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:10:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:06,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:10:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:06,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:10:06,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259253598] [2022-02-23 16:10:06,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259253598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:10:06,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709200559] [2022-02-23 16:10:06,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 16:10:06,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:06,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:10:06,364 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) [2022-02-23 16:10:06,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 16:10:06,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-02-23 16:10:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:10:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-23 16:10:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:10:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:10:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:10,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709200559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:10:10,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:10:10,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-02-23 16:10:10,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54542068] [2022-02-23 16:10:10,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:10:10,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-23 16:10:10,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:10:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-23 16:10:10,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-02-23 16:10:10,283 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 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) [2022-02-23 16:10:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:10:15,443 INFO L93 Difference]: Finished difference Result 331 states and 394 transitions. [2022-02-23 16:10:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-23 16:10:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 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 135 [2022-02-23 16:10:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:10:15,448 INFO L225 Difference]: With dead ends: 331 [2022-02-23 16:10:15,448 INFO L226 Difference]: Without dead ends: 265 [2022-02-23 16:10:15,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11275 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=24536, Invalid=43846, Unknown=0, NotChecked=0, Total=68382 [2022-02-23 16:10:15,454 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 525 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:10:15,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 53 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 16:10:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-23 16:10:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-02-23 16:10:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0038610038610039) internal successors, (260), 259 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:10:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 264 transitions. [2022-02-23 16:10:15,465 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 264 transitions. Word has length 135 [2022-02-23 16:10:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:10:15,466 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 264 transitions. [2022-02-23 16:10:15,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 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) [2022-02-23 16:10:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 264 transitions. [2022-02-23 16:10:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-02-23 16:10:15,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:10:15,469 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:10:15,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 16:10:15,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:15,671 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:10:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:10:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash -648904777, now seen corresponding path program 7 times [2022-02-23 16:10:15,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:10:15,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797934771] [2022-02-23 16:10:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:10:15,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:10:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:20,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:10:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:20,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:10:20,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797934771] [2022-02-23 16:10:20,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797934771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:10:20,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250901112] [2022-02-23 16:10:20,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 16:10:20,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:20,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:10:20,475 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) [2022-02-23 16:10:20,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 16:10:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:10:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 130 conjunts are in the unsatisfiable core [2022-02-23 16:10:20,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:10:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:21,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:10:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:10:34,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250901112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:10:34,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:10:34,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-02-23 16:10:34,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492607891] [2022-02-23 16:10:34,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:10:34,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 262 states [2022-02-23 16:10:34,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:10:34,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2022-02-23 16:10:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32908, Invalid=35474, Unknown=0, NotChecked=0, Total=68382 [2022-02-23 16:10:34,012 INFO L87 Difference]: Start difference. First operand 264 states and 264 transitions. Second operand has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 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) [2022-02-23 16:10:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:10:53,746 INFO L93 Difference]: Finished difference Result 651 states and 778 transitions. [2022-02-23 16:10:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-02-23 16:10:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 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 263 [2022-02-23 16:10:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:10:53,748 INFO L225 Difference]: With dead ends: 651 [2022-02-23 16:10:53,748 INFO L226 Difference]: Without dead ends: 521 [2022-02-23 16:10:53,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43051 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=98200, Invalid=169606, Unknown=0, NotChecked=0, Total=267806 [2022-02-23 16:10:53,759 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 16:10:53,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1287 Valid, 48 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 16:10:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-23 16:10:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 520. [2022-02-23 16:10:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 515 states have (on average 1.0019417475728156) internal successors, (516), 515 states have internal predecessors, (516), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:10:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 520 transitions. [2022-02-23 16:10:53,771 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 520 transitions. Word has length 263 [2022-02-23 16:10:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:10:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 520 transitions. [2022-02-23 16:10:53,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 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) [2022-02-23 16:10:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 520 transitions. [2022-02-23 16:10:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-02-23 16:10:53,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:10:53,777 INFO L514 BasicCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:10:53,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 16:10:53,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:10:53,991 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:10:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:10:53,992 INFO L85 PathProgramCache]: Analyzing trace with hash 209980983, now seen corresponding path program 8 times [2022-02-23 16:10:53,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:10:53,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263170293] [2022-02-23 16:10:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:10:53,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:10:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:11:12,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:11:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:11:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:11:12,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:11:12,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263170293] [2022-02-23 16:11:12,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263170293] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:11:12,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621890936] [2022-02-23 16:11:12,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:11:12,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:11:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:11:12,178 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) [2022-02-23 16:11:12,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 16:11:12,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:11:12,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:11:12,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 258 conjunts are in the unsatisfiable core [2022-02-23 16:11:12,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:11:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:11:13,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:12:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:12:04,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621890936] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:12:04,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:12:04,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [260, 259, 259] total 518 [2022-02-23 16:12:04,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397015686] [2022-02-23 16:12:04,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:12:04,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 518 states [2022-02-23 16:12:04,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:12:04,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 518 interpolants. [2022-02-23 16:12:04,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131340, Invalid=136466, Unknown=0, NotChecked=0, Total=267806 [2022-02-23 16:12:04,573 INFO L87 Difference]: Start difference. First operand 520 states and 520 transitions. Second operand has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 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) [2022-02-23 16:13:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:13:30,866 INFO L93 Difference]: Finished difference Result 1291 states and 1546 transitions. [2022-02-23 16:13:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 515 states. [2022-02-23 16:13:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 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 519 [2022-02-23 16:13:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:13:30,872 INFO L225 Difference]: With dead ends: 1291 [2022-02-23 16:13:30,872 INFO L226 Difference]: Without dead ends: 1033 [2022-02-23 16:13:30,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168043 ImplicationChecksByTransitivity, 136.3s TimeCoverageRelationStatistics Valid=392984, Invalid=666886, Unknown=0, NotChecked=0, Total=1059870 [2022-02-23 16:13:30,926 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2767 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 1283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2767 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1283 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:13:30,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2767 Valid, 78 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1283 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-23 16:13:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-02-23 16:13:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1032. [2022-02-23 16:13:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.0009737098344693) internal successors, (1028), 1027 states have internal predecessors, (1028), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:13:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1032 transitions. [2022-02-23 16:13:30,940 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1032 transitions. Word has length 519 [2022-02-23 16:13:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:13:30,941 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1032 transitions. [2022-02-23 16:13:30,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 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) [2022-02-23 16:13:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1032 transitions. [2022-02-23 16:13:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2022-02-23 16:13:30,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:13:30,961 INFO L514 BasicCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:13:30,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 16:13:31,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 16:13:31,180 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:13:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:13:31,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1182214967, now seen corresponding path program 9 times [2022-02-23 16:13:31,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:13:31,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577098672] [2022-02-23 16:13:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:13:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:13:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:14:43,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:14:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:14:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:14:43,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:14:43,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577098672] [2022-02-23 16:14:43,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577098672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:14:43,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848578910] [2022-02-23 16:14:43,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:14:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:14:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:14:43,158 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) [2022-02-23 16:14:43,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 16:14:48,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2022-02-23 16:14:48,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:14:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 514 conjunts are in the unsatisfiable core [2022-02-23 16:14:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:14:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:14:49,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:18:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:18:18,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848578910] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:18:18,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:18:18,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [516, 515, 515] total 1030 [2022-02-23 16:18:18,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902313849] [2022-02-23 16:18:18,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:18:18,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1030 states [2022-02-23 16:18:18,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:18:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1030 interpolants. [2022-02-23 16:18:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524812, Invalid=535058, Unknown=0, NotChecked=0, Total=1059870 [2022-02-23 16:18:18,278 INFO L87 Difference]: Start difference. First operand 1032 states and 1032 transitions. Second operand has 1030 states, 1030 states have (on average 1.9951456310679612) internal successors, (2055), 1027 states have internal predecessors, (2055), 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)