/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/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:38:29,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:38:29,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:38:29,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:38:29,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:38:29,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:38:29,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:38:29,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:38:29,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:38:29,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:38:29,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:38:29,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:38:29,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:38:29,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:38:29,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:38:29,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:38:29,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:38:29,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:38:29,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:38:29,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:38:29,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:38:29,532 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:38:29,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:38:29,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:38:29,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:38:29,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:38:29,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:38:29,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:38:29,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:38:29,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:38:29,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:38:29,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:38:29,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:38:29,536 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:38:29,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:38:29,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:38:29,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:38:29,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:38:29,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:38:29,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:38:29,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:38:29,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:38:29,537 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:38:29,538 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:38:29,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:38:29,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:38:29,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:38:29,774 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:38:29,775 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:38:29,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-23 16:38:29,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ddc5d785/e640c572fdcd46caac1997919d2c4b80/FLAGe18c87a74 [2022-02-23 16:38:30,187 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:38:30,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-23 16:38:30,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ddc5d785/e640c572fdcd46caac1997919d2c4b80/FLAGe18c87a74 [2022-02-23 16:38:30,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ddc5d785/e640c572fdcd46caac1997919d2c4b80 [2022-02-23 16:38:30,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:38:30,206 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:38:30,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:38:30,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:38:30,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:38:30,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e383d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30, skipping insertion in model container [2022-02-23 16:38:30,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:38:30,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:38:30,349 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-02-23 16:38:30,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:38:30,389 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:38:30,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-02-23 16:38:30,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:38:30,410 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:38:30,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30 WrapperNode [2022-02-23 16:38:30,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:38:30,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:38:30,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:38:30,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:38:30,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:38:30,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:38:30,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:38:30,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:38:30,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:38:30,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:30,484 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 16:38:30,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:38:30,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:38:30,529 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:38:30,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:38:30,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:38:30,529 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:38:30,530 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:38:30,530 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:38:30,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:38:30,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:38:30,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:38:30,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:38:30,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:38:30,510 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 16:38:30,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:38:30,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:38:30,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:38:30,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:38:30,590 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:38:30,592 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:38:30,684 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:38:30,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:38:30,689 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 16:38:30,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:38:30 BoogieIcfgContainer [2022-02-23 16:38:30,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:38:30,692 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:38:30,692 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:38:30,693 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:38:30,696 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:38:30" (1/1) ... [2022-02-23 16:38:30,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:38:30 BasicIcfg [2022-02-23 16:38:30,709 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:38:30,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:38:30,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:38:30,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:38:30,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:38:30" (1/4) ... [2022-02-23 16:38:30,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26271bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:38:30, skipping insertion in model container [2022-02-23 16:38:30,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:38:30" (2/4) ... [2022-02-23 16:38:30,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26271bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:38:30, skipping insertion in model container [2022-02-23 16:38:30,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:38:30" (3/4) ... [2022-02-23 16:38:30,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26271bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:38:30, skipping insertion in model container [2022-02-23 16:38:30,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:38:30" (4/4) ... [2022-02-23 16:38:30,716 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.cJordan [2022-02-23 16:38:30,721 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:38:30,721 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:38:30,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:38:30,777 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 16:38:30,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:38:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 16:38:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 16:38:30,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:30,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:30,803 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1381876426, now seen corresponding path program 1 times [2022-02-23 16:38:30,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:30,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211012614] [2022-02-23 16:38:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:30,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:30,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:30,946 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 16:38:30,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:30,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211012614] [2022-02-23 16:38:30,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211012614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:38:30,948 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:38:30,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:38:30,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051095068] [2022-02-23 16:38:30,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:38:30,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:38:30,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:38:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:38:30,986 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 16:38:31,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:31,013 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-02-23 16:38:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:38:31,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 16:38:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:31,021 INFO L225 Difference]: With dead ends: 22 [2022-02-23 16:38:31,021 INFO L226 Difference]: Without dead ends: 15 [2022-02-23 16:38:31,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:38:31,027 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:31,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:38:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-23 16:38:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-23 16:38:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 16:38:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-02-23 16:38:31,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-02-23 16:38:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:31,062 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-02-23 16:38:31,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 16:38:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-02-23 16:38:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 16:38:31,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:31,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:31,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:38:31,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1382799947, now seen corresponding path program 1 times [2022-02-23 16:38:31,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:31,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129022055] [2022-02-23 16:38:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,180 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 16:38:31,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:31,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129022055] [2022-02-23 16:38:31,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129022055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:38:31,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:38:31,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:38:31,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356343776] [2022-02-23 16:38:31,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:38:31,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:38:31,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:38:31,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:38:31,188 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. 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 16:38:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:31,240 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-02-23 16:38:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:38:31,241 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 16:38:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:31,242 INFO L225 Difference]: With dead ends: 17 [2022-02-23 16:38:31,242 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 16:38:31,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 16:38:31,247 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:31,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:38:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 16:38:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-23 16:38:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 16:38:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-23 16:38:31,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-23 16:38:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:31,255 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-23 16:38:31,255 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 16:38:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-23 16:38:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 16:38:31,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:31,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:31,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:38:31,261 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1658763799, now seen corresponding path program 1 times [2022-02-23 16:38:31,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:31,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850107867] [2022-02-23 16:38:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,318 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 16:38:31,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:31,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850107867] [2022-02-23 16:38:31,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850107867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:31,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488760040] [2022-02-23 16:38:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:31,330 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 16:38:31,348 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 16:38:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 16:38:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:31,447 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 16:38:31,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:31,492 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 16:38:31,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488760040] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:31,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:31,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-23 16:38:31,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932675584] [2022-02-23 16:38:31,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:31,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 16:38:31,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 16:38:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:38:31,498 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 16:38:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:31,581 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-02-23 16:38:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 16:38:31,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 16:38:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:31,583 INFO L225 Difference]: With dead ends: 23 [2022-02-23 16:38:31,584 INFO L226 Difference]: Without dead ends: 23 [2022-02-23 16:38:31,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-23 16:38:31,586 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:31,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:38:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-23 16:38:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-02-23 16:38:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 16:38:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-23 16:38:31,592 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-02-23 16:38:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:31,593 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-23 16:38:31,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 16:38:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-23 16:38:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-23 16:38:31,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:31,594 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:31,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 16:38:31,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:31,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:31,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1581176064, now seen corresponding path program 1 times [2022-02-23 16:38:31,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:31,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940650327] [2022-02-23 16:38:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:31,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:38:31,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:31,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940650327] [2022-02-23 16:38:31,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940650327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:38:31,859 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:38:31,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:38:31,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130516142] [2022-02-23 16:38:31,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:38:31,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:38:31,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:31,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:38:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:38:31,861 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16:38:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:31,896 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-02-23 16:38:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:38:31,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 19 [2022-02-23 16:38:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:31,898 INFO L225 Difference]: With dead ends: 24 [2022-02-23 16:38:31,898 INFO L226 Difference]: Without dead ends: 24 [2022-02-23 16:38:31,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 16:38:31,901 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:31,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:38:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-23 16:38:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-23 16:38:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 16:38:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-23 16:38:31,906 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2022-02-23 16:38:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:31,906 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-23 16:38:31,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16:38:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-23 16:38:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 16:38:31,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:31,907 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:31,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 16:38:31,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash 76189880, now seen corresponding path program 1 times [2022-02-23 16:38:31,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:31,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960597301] [2022-02-23 16:38:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:31,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:38:32,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:32,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960597301] [2022-02-23 16:38:32,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960597301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:32,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472540762] [2022-02-23 16:38:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:32,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:32,014 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 16:38:32,014 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 16:38:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 16:38:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:38:32,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:38:32,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472540762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:32,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:32,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-23 16:38:32,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674707594] [2022-02-23 16:38:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 16:38:32,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 16:38:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-23 16:38:32,206 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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 16:38:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:32,290 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-02-23 16:38:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:38:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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 23 [2022-02-23 16:38:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:32,292 INFO L225 Difference]: With dead ends: 32 [2022-02-23 16:38:32,292 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 16:38:32,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-02-23 16:38:32,293 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:32,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:38:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 16:38:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 16:38:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 16:38:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-23 16:38:32,297 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2022-02-23 16:38:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:32,297 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-23 16:38:32,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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 16:38:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-23 16:38:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 16:38:32,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:32,298 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:32,322 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 16:38:32,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:32,516 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash 200191536, now seen corresponding path program 2 times [2022-02-23 16:38:32,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:32,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449384731] [2022-02-23 16:38:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:32,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:38:32,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:32,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449384731] [2022-02-23 16:38:32,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449384731] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:32,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388451564] [2022-02-23 16:38:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:38:32,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:32,602 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 16:38:32,603 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 16:38:32,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:38:32,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 16:38:32,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:38:32,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:38:32,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388451564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:32,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:32,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 16:38:32,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742683594] [2022-02-23 16:38:32,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:32,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:38:32,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:38:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:38:32,882 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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 16:38:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:33,097 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-02-23 16:38:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 16:38:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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 31 [2022-02-23 16:38:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:33,098 INFO L225 Difference]: With dead ends: 48 [2022-02-23 16:38:33,099 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 16:38:33,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-02-23 16:38:33,100 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:33,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 27 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:38:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 16:38:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-23 16:38:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 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 16:38:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-02-23 16:38:33,105 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 31 [2022-02-23 16:38:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:33,105 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-02-23 16:38:33,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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 16:38:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-02-23 16:38:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 16:38:33,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:33,106 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:33,129 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 16:38:33,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:33,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2099511584, now seen corresponding path program 3 times [2022-02-23 16:38:33,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:33,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013975559] [2022-02-23 16:38:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:33,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 16:38:33,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:33,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013975559] [2022-02-23 16:38:33,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013975559] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:33,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197020979] [2022-02-23 16:38:33,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:38:33,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:33,521 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 16:38:33,522 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 16:38:33,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 16:38:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:33,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 16:38:33,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-02-23 16:38:33,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-02-23 16:38:33,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197020979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:33,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:33,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 7] total 25 [2022-02-23 16:38:33,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139429002] [2022-02-23 16:38:33,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:33,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 16:38:33,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 16:38:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2022-02-23 16:38:33,822 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:38:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:34,295 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-02-23 16:38:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 16:38:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-23 16:38:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:34,296 INFO L225 Difference]: With dead ends: 65 [2022-02-23 16:38:34,296 INFO L226 Difference]: Without dead ends: 62 [2022-02-23 16:38:34,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=653, Invalid=1509, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 16:38:34,298 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:34,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 47 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:38:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-23 16:38:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-23 16:38:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 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 16:38:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-02-23 16:38:34,309 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2022-02-23 16:38:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:34,309 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-02-23 16:38:34,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:38:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-02-23 16:38:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-23 16:38:34,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:34,311 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:34,339 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 16:38:34,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:34,511 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash 75572905, now seen corresponding path program 4 times [2022-02-23 16:38:34,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:34,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872826353] [2022-02-23 16:38:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:34,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 16:38:34,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:34,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872826353] [2022-02-23 16:38:34,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872826353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:34,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592800341] [2022-02-23 16:38:34,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:38:34,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:34,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:34,734 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 16:38:34,735 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 16:38:34,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:38:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 16:38:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 16:38:34,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 16:38:35,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592800341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:35,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:35,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-02-23 16:38:35,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801287167] [2022-02-23 16:38:35,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:35,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-23 16:38:35,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-23 16:38:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 16:38:35,285 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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 16:38:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:35,897 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-02-23 16:38:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 16:38:35,898 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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 61 [2022-02-23 16:38:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:35,899 INFO L225 Difference]: With dead ends: 96 [2022-02-23 16:38:35,899 INFO L226 Difference]: Without dead ends: 96 [2022-02-23 16:38:35,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-02-23 16:38:35,901 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:35,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:38:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-23 16:38:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-23 16:38:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 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 16:38:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-02-23 16:38:35,907 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 61 [2022-02-23 16:38:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-02-23 16:38:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 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 16:38:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-02-23 16:38:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-23 16:38:35,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:35,910 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:35,938 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 16:38:36,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:36,135 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash 377058471, now seen corresponding path program 5 times [2022-02-23 16:38:36,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:36,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254585751] [2022-02-23 16:38:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:36,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 16:38:36,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:36,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254585751] [2022-02-23 16:38:36,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254585751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:36,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268852038] [2022-02-23 16:38:36,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:38:36,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:36,674 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 16:38:36,718 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 16:38:36,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-02-23 16:38:36,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:36,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 16:38:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-02-23 16:38:37,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-02-23 16:38:38,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268852038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:38,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:38,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 17, 17] total 66 [2022-02-23 16:38:38,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650485093] [2022-02-23 16:38:38,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:38,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-23 16:38:38,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-23 16:38:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-02-23 16:38:38,166 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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 16:38:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:40,247 INFO L93 Difference]: Finished difference Result 214 states and 252 transitions. [2022-02-23 16:38:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-23 16:38:40,247 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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 95 [2022-02-23 16:38:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:40,249 INFO L225 Difference]: With dead ends: 214 [2022-02-23 16:38:40,249 INFO L226 Difference]: Without dead ends: 214 [2022-02-23 16:38:40,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-02-23 16:38:40,253 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 279 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:40,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 55 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 16:38:40,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-23 16:38:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-02-23 16:38:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.186602870813397) internal successors, (248), 209 states have internal predecessors, (248), 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 16:38:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2022-02-23 16:38:40,269 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 252 transitions. Word has length 95 [2022-02-23 16:38:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:40,269 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 252 transitions. [2022-02-23 16:38:40,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 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 16:38:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 252 transitions. [2022-02-23 16:38:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-23 16:38:40,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:40,275 INFO L514 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:40,305 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 16:38:40,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:40,502 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1709022179, now seen corresponding path program 6 times [2022-02-23 16:38:40,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:40,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984656363] [2022-02-23 16:38:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:40,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:41,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-02-23 16:38:41,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:41,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984656363] [2022-02-23 16:38:41,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984656363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:41,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019837643] [2022-02-23 16:38:41,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 16:38:41,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:41,064 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 16:38:41,101 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 16:38:41,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-02-23 16:38:41,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:41,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 16:38:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-02-23 16:38:41,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-02-23 16:38:42,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019837643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:42,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:42,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 7, 10] total 50 [2022-02-23 16:38:42,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485177501] [2022-02-23 16:38:42,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:42,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 16:38:42,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 16:38:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=1406, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 16:38:42,067 INFO L87 Difference]: Start difference. First operand 214 states and 252 transitions. Second operand has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:38:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:43,217 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2022-02-23 16:38:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-23 16:38:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-02-23 16:38:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:43,219 INFO L225 Difference]: With dead ends: 243 [2022-02-23 16:38:43,219 INFO L226 Difference]: Without dead ends: 240 [2022-02-23 16:38:43,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3128, Invalid=6184, Unknown=0, NotChecked=0, Total=9312 [2022-02-23 16:38:43,223 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:43,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 47 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:38:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-23 16:38:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-23 16:38:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2170212765957447) internal successors, (286), 235 states have internal predecessors, (286), 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 16:38:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 290 transitions. [2022-02-23 16:38:43,234 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 290 transitions. Word has length 213 [2022-02-23 16:38:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:43,234 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 290 transitions. [2022-02-23 16:38:43,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:38:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 290 transitions. [2022-02-23 16:38:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-23 16:38:43,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:43,237 INFO L514 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:43,255 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 16:38:43,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:43,444 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1030847343, now seen corresponding path program 7 times [2022-02-23 16:38:43,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:43,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622908194] [2022-02-23 16:38:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 16:38:44,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:44,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622908194] [2022-02-23 16:38:44,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622908194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:44,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086749193] [2022-02-23 16:38:44,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 16:38:44,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:44,024 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 16:38:44,035 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 16:38:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 16:38:44,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 16:38:44,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 16:38:46,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086749193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:46,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:46,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-02-23 16:38:46,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343718435] [2022-02-23 16:38:46,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:46,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-23 16:38:46,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:46,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-23 16:38:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-02-23 16:38:46,026 INFO L87 Difference]: Start difference. First operand 240 states and 290 transitions. Second operand has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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 16:38:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:38:47,957 INFO L93 Difference]: Finished difference Result 312 states and 362 transitions. [2022-02-23 16:38:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-23 16:38:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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 239 [2022-02-23 16:38:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:38:47,959 INFO L225 Difference]: With dead ends: 312 [2022-02-23 16:38:47,959 INFO L226 Difference]: Without dead ends: 312 [2022-02-23 16:38:47,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2022-02-23 16:38:47,964 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:38:47,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:38:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-23 16:38:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-02-23 16:38:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.1661237785016287) internal successors, (358), 307 states have internal predecessors, (358), 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 16:38:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 362 transitions. [2022-02-23 16:38:47,986 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 362 transitions. Word has length 239 [2022-02-23 16:38:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:38:47,987 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 362 transitions. [2022-02-23 16:38:47,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 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 16:38:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 362 transitions. [2022-02-23 16:38:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-02-23 16:38:47,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:38:47,990 INFO L514 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:38:48,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 16:38:48,190 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,SelfDestructingSolverStorable10 [2022-02-23 16:38:48,191 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:38:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:38:48,191 INFO L85 PathProgramCache]: Analyzing trace with hash -488290871, now seen corresponding path program 8 times [2022-02-23 16:38:48,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:38:48,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601958809] [2022-02-23 16:38:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:38:48,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:38:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:50,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:38:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:38:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 16:38:50,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:38:50,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601958809] [2022-02-23 16:38:50,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601958809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:38:50,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102230021] [2022-02-23 16:38:50,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:38:50,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:38:50,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:38:50,090 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 16:38:50,091 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 16:38:50,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:38:50,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:38:50,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 72 conjunts are in the unsatisfiable core [2022-02-23 16:38:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:38:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 16:38:50,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:38:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 16:38:55,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102230021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:38:55,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:38:55,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-02-23 16:38:55,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155192417] [2022-02-23 16:38:55,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:38:55,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-23 16:38:55,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:38:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-23 16:38:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-02-23 16:38:55,743 INFO L87 Difference]: Start difference. First operand 312 states and 362 transitions. Second operand has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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 16:39:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:39:02,673 INFO L93 Difference]: Finished difference Result 456 states and 506 transitions. [2022-02-23 16:39:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-23 16:39:02,674 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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 311 [2022-02-23 16:39:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:39:02,675 INFO L225 Difference]: With dead ends: 456 [2022-02-23 16:39:02,675 INFO L226 Difference]: Without dead ends: 456 [2022-02-23 16:39:02,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12916 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=31033, Invalid=51623, Unknown=0, NotChecked=0, Total=82656 [2022-02-23 16:39:02,682 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:39:02,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 42 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:39:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-23 16:39:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-02-23 16:39:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 451 states have (on average 1.1130820399113082) internal successors, (502), 451 states have internal predecessors, (502), 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 16:39:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 506 transitions. [2022-02-23 16:39:02,691 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 506 transitions. Word has length 311 [2022-02-23 16:39:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:39:02,691 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 506 transitions. [2022-02-23 16:39:02,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 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 16:39:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 506 transitions. [2022-02-23 16:39:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-02-23 16:39:02,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:39:02,698 INFO L514 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:39:02,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 16:39:02,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:39:02,911 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:39:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:39:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash -158375879, now seen corresponding path program 9 times [2022-02-23 16:39:02,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:39:02,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144495407] [2022-02-23 16:39:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:39:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:39:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:39:09,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:39:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:39:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-23 16:39:09,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:39:09,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144495407] [2022-02-23 16:39:09,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144495407] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:39:09,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830822160] [2022-02-23 16:39:09,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:39:09,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:39:09,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:39:09,484 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:39:09,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 16:39:09,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-02-23 16:39:09,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:39:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 16:39:09,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:39:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-02-23 16:39:11,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:39:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-02-23 16:39:12,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830822160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:39:12,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:39:12,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 13, 16] total 171 [2022-02-23 16:39:12,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580578276] [2022-02-23 16:39:12,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:39:12,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-23 16:39:12,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:39:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-23 16:39:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13870, Invalid=15200, Unknown=0, NotChecked=0, Total=29070 [2022-02-23 16:39:12,799 INFO L87 Difference]: Start difference. First operand 456 states and 506 transitions. Second operand has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:39:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:39:23,715 INFO L93 Difference]: Finished difference Result 509 states and 583 transitions. [2022-02-23 16:39:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-23 16:39:23,716 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-02-23 16:39:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:39:23,718 INFO L225 Difference]: With dead ends: 509 [2022-02-23 16:39:23,718 INFO L226 Difference]: Without dead ends: 506 [2022-02-23 16:39:23,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14711 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=41606, Invalid=72976, Unknown=0, NotChecked=0, Total=114582 [2022-02-23 16:39:23,724 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 572 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 16:39:23,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 52 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 16:39:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-23 16:39:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-02-23 16:39:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.1497005988023952) internal successors, (576), 501 states have internal predecessors, (576), 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 16:39:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 580 transitions. [2022-02-23 16:39:23,733 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 580 transitions. Word has length 455 [2022-02-23 16:39:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:39:23,733 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 580 transitions. [2022-02-23 16:39:23,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:39:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 580 transitions. [2022-02-23 16:39:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-02-23 16:39:23,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:39:23,760 INFO L514 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:39:23,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 16:39:23,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 16:39:23,972 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:39:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:39:23,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1120053885, now seen corresponding path program 10 times [2022-02-23 16:39:23,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:39:23,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514197750] [2022-02-23 16:39:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:39:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:39:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:39:30,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:39:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:39:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 16:39:30,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:39:30,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514197750] [2022-02-23 16:39:30,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514197750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:39:30,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672831268] [2022-02-23 16:39:30,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:39:30,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:39:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:39:30,540 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:39:30,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 16:39:30,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:39:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:39:30,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 145 conjunts are in the unsatisfiable core [2022-02-23 16:39:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:39:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 16:39:31,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:39:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 16:39:50,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672831268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:39:50,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:39:50,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 292 [2022-02-23 16:39:50,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094137725] [2022-02-23 16:39:50,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:39:50,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 292 states [2022-02-23 16:39:50,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:39:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 292 interpolants. [2022-02-23 16:39:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42197, Invalid=42775, Unknown=0, NotChecked=0, Total=84972 [2022-02-23 16:39:50,791 INFO L87 Difference]: Start difference. First operand 506 states and 580 transitions. Second operand has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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 16:40:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:17,611 INFO L93 Difference]: Finished difference Result 796 states and 870 transitions. [2022-02-23 16:40:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-02-23 16:40:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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 505 [2022-02-23 16:40:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:17,615 INFO L225 Difference]: With dead ends: 796 [2022-02-23 16:40:17,615 INFO L226 Difference]: Without dead ends: 796 [2022-02-23 16:40:17,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=126006, Invalid=209814, Unknown=0, NotChecked=0, Total=335820 [2022-02-23 16:40:17,631 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 299 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:17,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 47 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 16:40:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-02-23 16:40:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2022-02-23 16:40:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 791 states have (on average 1.0948166877370418) internal successors, (866), 791 states have internal predecessors, (866), 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 16:40:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 870 transitions. [2022-02-23 16:40:17,643 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 870 transitions. Word has length 505 [2022-02-23 16:40:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:17,643 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 870 transitions. [2022-02-23 16:40:17,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 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 16:40:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 870 transitions. [2022-02-23 16:40:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-02-23 16:40:17,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:17,650 INFO L514 BasicCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:17,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-23 16:40:17,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 16:40:17,851 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash -780439167, now seen corresponding path program 11 times [2022-02-23 16:40:17,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:17,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121804353] [2022-02-23 16:40:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:43,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-23 16:40:43,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:43,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121804353] [2022-02-23 16:40:43,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121804353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:43,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279098434] [2022-02-23 16:40:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:40:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:43,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:43,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 16:40:43,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2022-02-23 16:40:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:40:43,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2022-02-23 16:40:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:41:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-02-23 16:41:17,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:42:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-02-23 16:42:05,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279098434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:42:05,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:42:05,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [292, 151, 151] total 590 [2022-02-23 16:42:05,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781909645] [2022-02-23 16:42:05,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:42:05,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 590 states [2022-02-23 16:42:05,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:42:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 590 interpolants. [2022-02-23 16:42:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173168, Invalid=174342, Unknown=0, NotChecked=0, Total=347510 [2022-02-23 16:42:05,569 INFO L87 Difference]: Start difference. First operand 796 states and 870 transitions. Second operand has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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 16:47:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:47:59,538 INFO L93 Difference]: Finished difference Result 1870 states and 2212 transitions. [2022-02-23 16:47:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 590 states. [2022-02-23 16:47:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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 795 [2022-02-23 16:47:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:47:59,547 INFO L225 Difference]: With dead ends: 1870 [2022-02-23 16:47:59,548 INFO L226 Difference]: Without dead ends: 1870 [2022-02-23 16:47:59,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 1175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183157 ImplicationChecksByTransitivity, 222.0s TimeCoverageRelationStatistics Valid=519498, Invalid=864654, Unknown=0, NotChecked=0, Total=1384152 [2022-02-23 16:47:59,677 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3562 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 5011 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3562 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 6855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5011 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:47:59,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3562 Valid, 60 Invalid, 6855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5011 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-23 16:47:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-02-23 16:47:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1870. [2022-02-23 16:47:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1865 states have (on average 1.1839142091152814) internal successors, (2208), 1865 states have internal predecessors, (2208), 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 16:47:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2212 transitions. [2022-02-23 16:47:59,705 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2212 transitions. Word has length 795 [2022-02-23 16:47:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:47:59,706 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2212 transitions. [2022-02-23 16:47:59,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 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 16:47:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2212 transitions. [2022-02-23 16:47:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1870 [2022-02-23 16:47:59,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:47:59,734 INFO L514 BasicCegarLoop]: trace histogram [609, 320, 320, 298, 289, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:47:59,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 16:47:59,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 16:47:59,960 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:47:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:47:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2022732223, now seen corresponding path program 12 times [2022-02-23 16:47:59,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:47:59,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898527520] [2022-02-23 16:47:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:47:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:48:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:48:26,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:48:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:48:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 185310 proven. 83810 refuted. 0 times theorem prover too weak. 203841 trivial. 0 not checked. [2022-02-23 16:48:26,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:48:26,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898527520] [2022-02-23 16:48:26,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898527520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:48:26,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660142570] [2022-02-23 16:48:26,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 16:48:26,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:48:26,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:48:26,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:48:26,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 16:48:27,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-02-23 16:48:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:48:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-23 16:48:27,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:48:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-02-23 16:48:33,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:48:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-02-23 16:48:39,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660142570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:48:39,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:48:39,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [293, 25, 28] total 342 [2022-02-23 16:48:39,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000095400] [2022-02-23 16:48:39,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:48:39,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 342 states [2022-02-23 16:48:39,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:48:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 342 interpolants. [2022-02-23 16:48:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56962, Invalid=59660, Unknown=0, NotChecked=0, Total=116622 [2022-02-23 16:48:39,693 INFO L87 Difference]: Start difference. First operand 1870 states and 2212 transitions. Second operand has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:49:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:49:24,948 INFO L93 Difference]: Finished difference Result 1971 states and 2361 transitions. [2022-02-23 16:49:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-02-23 16:49:24,952 INFO L78 Accepts]: Start accepts. Automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1869 [2022-02-23 16:49:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:49:24,958 INFO L225 Difference]: With dead ends: 1971 [2022-02-23 16:49:24,958 INFO L226 Difference]: Without dead ends: 1968 [2022-02-23 16:49:24,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4415 GetRequests, 3736 SyntacticMatches, 0 SemanticMatches, 679 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58832 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=170882, Invalid=292198, Unknown=0, NotChecked=0, Total=463080 [2022-02-23 16:49:24,980 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1157 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 2009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2009 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:49:24,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 52 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2009 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 16:49:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-02-23 16:49:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2022-02-23 16:49:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1963 states have (on average 1.1991849210392256) internal successors, (2354), 1963 states have internal predecessors, (2354), 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 16:49:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2358 transitions. [2022-02-23 16:49:25,005 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2358 transitions. Word has length 1869 [2022-02-23 16:49:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:49:25,006 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2358 transitions. [2022-02-23 16:49:25,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:49:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2358 transitions. [2022-02-23 16:49:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1968 [2022-02-23 16:49:25,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:49:25,035 INFO L514 BasicCegarLoop]: trace histogram [634, 344, 344, 298, 290, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:49:25,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-23 16:49:25,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 16:49:25,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:49:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:49:25,236 INFO L85 PathProgramCache]: Analyzing trace with hash -970120395, now seen corresponding path program 13 times [2022-02-23 16:49:25,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:49:25,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094636589] [2022-02-23 16:49:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:49:25,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:49:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:49:51,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:49:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:49:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-23 16:49:51,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:49:51,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094636589] [2022-02-23 16:49:51,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094636589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:49:51,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393093246] [2022-02-23 16:49:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 16:49:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:49:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:49:51,767 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:49:51,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 16:49:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:49:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 3623 conjuncts, 292 conjunts are in the unsatisfiable core [2022-02-23 16:49:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:49:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-23 16:49:54,690 INFO L328 TraceCheckSpWp]: Computing backward predicates...