/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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:22:44,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:22:44,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:22:44,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:22:44,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:22:44,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:22:44,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:22:44,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:22:44,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:22:44,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:22:44,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:22:45,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:22:45,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:22:45,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:22:45,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:22:45,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:22:45,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:22:45,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:22:45,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:22:45,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:22:45,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:22:45,025 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:22:45,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:22:45,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:22:45,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:22:45,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:22:45,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:22:45,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:22:45,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:22:45,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:22:45,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:22:45,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:22:45,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:22:45,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:22:45,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:22:45,029 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:22:45,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:22:45,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:22:45,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:22:45,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:22:45,226 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:22:45,227 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:22:45,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-02-14 21:22:45,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62682e81f/4bb08fe4f52646b2881839f29b40e0a2/FLAG70c2dadba [2022-02-14 21:22:45,686 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:22:45,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-02-14 21:22:45,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62682e81f/4bb08fe4f52646b2881839f29b40e0a2/FLAG70c2dadba [2022-02-14 21:22:46,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62682e81f/4bb08fe4f52646b2881839f29b40e0a2 [2022-02-14 21:22:46,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:22:46,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:22:46,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:22:46,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:22:46,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:22:46,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0cc470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46, skipping insertion in model container [2022-02-14 21:22:46,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:22:46,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:22:46,283 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_8.c[318,331] [2022-02-14 21:22:46,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:22:46,310 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:22:46,329 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_8.c[318,331] [2022-02-14 21:22:46,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:22:46,342 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:22:46,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46 WrapperNode [2022-02-14 21:22:46,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:22:46,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:22:46,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:22:46,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:22:46,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:22:46,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:22:46,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:22:46,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:22:46,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:22:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:46,417 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) [2022-02-14 21:22:46,435 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 [2022-02-14 21:22:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:22:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:22:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:22:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:22:46,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:22:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:22:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:22:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:22:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:22:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:22:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:22:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:22:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:22:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:22:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:22:46,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:22:46,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:22:46,500 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:22:46,501 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:22:46,576 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:22:46,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:22:46,581 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 21:22:46,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:22:46 BoogieIcfgContainer [2022-02-14 21:22:46,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:22:46,586 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:22:46,586 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:22:46,587 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:22:46,599 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:22:46" (1/1) ... [2022-02-14 21:22:46,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:22:46 BasicIcfg [2022-02-14 21:22:46,609 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:22:46,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:22:46,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:22:46,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:22:46,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:22:46" (1/4) ... [2022-02-14 21:22:46,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e278c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:22:46, skipping insertion in model container [2022-02-14 21:22:46,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:22:46" (2/4) ... [2022-02-14 21:22:46,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e278c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:22:46, skipping insertion in model container [2022-02-14 21:22:46,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:22:46" (3/4) ... [2022-02-14 21:22:46,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e278c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:22:46, skipping insertion in model container [2022-02-14 21:22:46,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:22:46" (4/4) ... [2022-02-14 21:22:46,614 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.cJordan [2022-02-14 21:22:46,617 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:22:46,617 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:22:46,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:22:46,666 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 [2022-02-14 21:22:46,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:22:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-02-14 21:22:46,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:22:46,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:46,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:46,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash 447419557, now seen corresponding path program 1 times [2022-02-14 21:22:46,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:46,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26520153] [2022-02-14 21:22:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:46,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:46,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:46,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26520153] [2022-02-14 21:22:46,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26520153] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:22:46,813 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:22:46,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 21:22:46,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215604052] [2022-02-14 21:22:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:22:46,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 21:22:46,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 21:22:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:22:46,844 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-02-14 21:22:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:46,877 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-02-14 21:22:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 21:22:46,880 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 [2022-02-14 21:22:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:46,885 INFO L225 Difference]: With dead ends: 21 [2022-02-14 21:22:46,885 INFO L226 Difference]: Without dead ends: 14 [2022-02-14 21:22:46,886 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 [2022-02-14 21:22:46,888 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 [2022-02-14 21:22:46,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:22:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-14 21:22:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-14 21:22:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-02-14 21:22:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-14 21:22:46,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-14 21:22:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:46,909 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-14 21:22:46,909 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) [2022-02-14 21:22:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-14 21:22:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:22:46,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:46,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:46,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:22:46,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash 448343078, now seen corresponding path program 1 times [2022-02-14 21:22:46,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:46,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825776989] [2022-02-14 21:22:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:46,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:47,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:47,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825776989] [2022-02-14 21:22:47,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825776989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:22:47,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:22:47,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:22:47,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566597009] [2022-02-14 21:22:47,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:22:47,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:22:47,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:22:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:22:47,005 INFO L87 Difference]: Start difference. First operand 14 states and 15 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) [2022-02-14 21:22:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:47,036 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-02-14 21:22:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:22:47,037 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 [2022-02-14 21:22:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:47,037 INFO L225 Difference]: With dead ends: 17 [2022-02-14 21:22:47,037 INFO L226 Difference]: Without dead ends: 17 [2022-02-14 21:22:47,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:22:47,038 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:47,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:22:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-14 21:22:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-14 21:22:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2022-02-14 21:22:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-14 21:22:47,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-02-14 21:22:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:47,042 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-14 21:22:47,042 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) [2022-02-14 21:22:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-14 21:22:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-14 21:22:47,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:47,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:47,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:22:47,043 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1516694440, now seen corresponding path program 1 times [2022-02-14 21:22:47,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:47,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165512941] [2022-02-14 21:22:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:47,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:47,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:47,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165512941] [2022-02-14 21:22:47,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165512941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:47,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336786794] [2022-02-14 21:22:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:47,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:47,138 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) [2022-02-14 21:22:47,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:22:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:47,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 21:22:47,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:47,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:47,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336786794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:47,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:47,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-02-14 21:22:47,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782827896] [2022-02-14 21:22:47,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 21:22:47,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 21:22:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-14 21:22:47,307 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-02-14 21:22:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:47,393 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-14 21:22:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 21:22:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 14 [2022-02-14 21:22:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:47,394 INFO L225 Difference]: With dead ends: 24 [2022-02-14 21:22:47,394 INFO L226 Difference]: Without dead ends: 24 [2022-02-14 21:22:47,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-14 21:22:47,396 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:47,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:22:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-14 21:22:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-14 21:22:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-02-14 21:22:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-14 21:22:47,399 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-02-14 21:22:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:47,399 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-14 21:22:47,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-02-14 21:22:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-14 21:22:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 21:22:47,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:47,400 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:47,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 21:22:47,632 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 [2022-02-14 21:22:47,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1579293370, now seen corresponding path program 1 times [2022-02-14 21:22:47,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:47,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516013312] [2022-02-14 21:22:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:47,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 21:22:47,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:47,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516013312] [2022-02-14 21:22:47,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516013312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:47,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972154085] [2022-02-14 21:22:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:47,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:47,729 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) [2022-02-14 21:22:47,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 21:22:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:47,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 21:22:47,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 21:22:47,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 21:22:48,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972154085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:48,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:48,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-02-14 21:22:48,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729505989] [2022-02-14 21:22:48,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:48,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:22:48,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:22:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:22:48,016 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-02-14 21:22:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:48,176 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-14 21:22:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 21:22:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 [2022-02-14 21:22:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:48,178 INFO L225 Difference]: With dead ends: 34 [2022-02-14 21:22:48,178 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 21:22:48,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-02-14 21:22:48,179 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:48,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:22:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 21:22:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-02-14 21:22:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2022-02-14 21:22:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-14 21:22:48,183 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2022-02-14 21:22:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:48,183 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-14 21:22:48,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-02-14 21:22:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-14 21:22:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 21:22:48,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:48,183 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:48,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 21:22:48,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 21:22:48,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash -888303194, now seen corresponding path program 2 times [2022-02-14 21:22:48,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:48,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452347684] [2022-02-14 21:22:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:48,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:48,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:48,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:48,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452347684] [2022-02-14 21:22:48,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452347684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:48,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889125775] [2022-02-14 21:22:48,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:22:48,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:48,556 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) [2022-02-14 21:22:48,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 21:22:48,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:22:48,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 21:22:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:48,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:48,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889125775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:48,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:48,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-02-14 21:22:48,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201796921] [2022-02-14 21:22:48,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:48,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 21:22:48,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:48,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 21:22:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-14 21:22:48,830 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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) [2022-02-14 21:22:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:49,220 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-02-14 21:22:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 21:22:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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 [2022-02-14 21:22:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:49,221 INFO L225 Difference]: With dead ends: 42 [2022-02-14 21:22:49,221 INFO L226 Difference]: Without dead ends: 42 [2022-02-14 21:22:49,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2022-02-14 21:22:49,222 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:49,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 38 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:22:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-14 21:22:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-14 21:22:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 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) [2022-02-14 21:22:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-02-14 21:22:49,225 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-02-14 21:22:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:49,226 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-02-14 21:22:49,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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) [2022-02-14 21:22:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-02-14 21:22:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 21:22:49,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:49,227 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:49,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 21:22:49,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:49,435 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:49,436 INFO L85 PathProgramCache]: Analyzing trace with hash -443899610, now seen corresponding path program 2 times [2022-02-14 21:22:49,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:49,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325713717] [2022-02-14 21:22:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:22:49,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:49,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325713717] [2022-02-14 21:22:49,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325713717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:49,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64979659] [2022-02-14 21:22:49,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:22:49,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:49,600 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) [2022-02-14 21:22:49,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 21:22:49,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:22:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 21:22:49,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:22:49,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 21:22:49,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64979659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:49,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:49,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-14 21:22:49,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697974409] [2022-02-14 21:22:49,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:49,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 21:22:49,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 21:22:49,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-14 21:22:49,972 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-02-14 21:22:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:51,623 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-02-14 21:22:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 21:22:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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 41 [2022-02-14 21:22:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:51,624 INFO L225 Difference]: With dead ends: 60 [2022-02-14 21:22:51,624 INFO L226 Difference]: Without dead ends: 60 [2022-02-14 21:22:51,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-02-14 21:22:51,625 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:51,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 48 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:22:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-14 21:22:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-02-14 21:22:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 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) [2022-02-14 21:22:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-02-14 21:22:51,629 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 41 [2022-02-14 21:22:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:51,629 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-02-14 21:22:51,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-02-14 21:22:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-02-14 21:22:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 21:22:51,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:51,630 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:51,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 21:22:51,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:51,830 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash -556846618, now seen corresponding path program 3 times [2022-02-14 21:22:51,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:51,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553370821] [2022-02-14 21:22:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:51,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:52,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:52,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:52,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553370821] [2022-02-14 21:22:52,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553370821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:52,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766296582] [2022-02-14 21:22:52,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:22:52,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:52,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:52,124 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) [2022-02-14 21:22:52,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 21:22:52,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-14 21:22:52,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 21:22:52,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-14 21:22:52,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 21:22:52,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766296582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:22:52,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 21:22:52,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-02-14 21:22:52,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745424950] [2022-02-14 21:22:52,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:22:52,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 21:22:52,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:52,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 21:22:52,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-14 21:22:52,283 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:52,323 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-02-14 21:22:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 21:22:52,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-14 21:22:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:52,324 INFO L225 Difference]: With dead ends: 60 [2022-02-14 21:22:52,324 INFO L226 Difference]: Without dead ends: 60 [2022-02-14 21:22:52,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-14 21:22:52,324 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:52,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:22:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-14 21:22:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-02-14 21:22:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2022-02-14 21:22:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-02-14 21:22:52,339 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 41 [2022-02-14 21:22:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:52,340 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-02-14 21:22:52,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-02-14 21:22:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-14 21:22:52,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:52,341 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:52,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 21:22:52,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:52,542 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash -236436009, now seen corresponding path program 3 times [2022-02-14 21:22:52,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:52,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304769543] [2022-02-14 21:22:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:52,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:52,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:52,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304769543] [2022-02-14 21:22:52,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304769543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:52,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21904824] [2022-02-14 21:22:52,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:22:52,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:52,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:52,796 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) [2022-02-14 21:22:52,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 21:22:52,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 21:22:52,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:52,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 21:22:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-14 21:22:53,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-14 21:22:53,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21904824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:53,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:53,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2022-02-14 21:22:53,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705205032] [2022-02-14 21:22:53,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:53,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 21:22:53,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 21:22:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-02-14 21:22:53,225 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-02-14 21:22:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:54,299 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-02-14 21:22:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 21:22:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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 56 [2022-02-14 21:22:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:54,301 INFO L225 Difference]: With dead ends: 79 [2022-02-14 21:22:54,301 INFO L226 Difference]: Without dead ends: 79 [2022-02-14 21:22:54,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2022-02-14 21:22:54,302 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 182 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:54,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 62 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 21:22:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-14 21:22:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-02-14 21:22:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 states have internal predecessors, (76), 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) [2022-02-14 21:22:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-02-14 21:22:54,307 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 56 [2022-02-14 21:22:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:54,307 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-02-14 21:22:54,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-02-14 21:22:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-02-14 21:22:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-14 21:22:54,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:54,308 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:54,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-14 21:22:54,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:54,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:54,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1430063529, now seen corresponding path program 4 times [2022-02-14 21:22:54,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:54,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720953095] [2022-02-14 21:22:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:54,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:54,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-14 21:22:54,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:54,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720953095] [2022-02-14 21:22:54,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720953095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:54,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843543845] [2022-02-14 21:22:54,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 21:22:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:54,851 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) [2022-02-14 21:22:54,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 21:22:54,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 21:22:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-14 21:22:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:55,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:22:56,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843543845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:56,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:56,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 24] total 47 [2022-02-14 21:22:56,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592294600] [2022-02-14 21:22:56,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:56,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-14 21:22:56,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:56,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-14 21:22:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 21:22:56,363 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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) [2022-02-14 21:24:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:24:08,478 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-02-14 21:24:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-14 21:24:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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 74 [2022-02-14 21:24:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:24:08,480 INFO L225 Difference]: With dead ends: 153 [2022-02-14 21:24:08,480 INFO L226 Difference]: Without dead ends: 153 [2022-02-14 21:24:08,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=2121, Invalid=5710, Unknown=1, NotChecked=0, Total=7832 [2022-02-14 21:24:08,483 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 303 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 21:24:08,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 119 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 21:24:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-14 21:24:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-02-14 21:24:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 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) [2022-02-14 21:24:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2022-02-14 21:24:08,490 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 74 [2022-02-14 21:24:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:24:08,491 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2022-02-14 21:24:08,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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) [2022-02-14 21:24:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2022-02-14 21:24:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-14 21:24:08,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:24:08,494 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 42, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:24:08,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 21:24:08,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:24:08,723 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:24:08,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:24:08,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1642783383, now seen corresponding path program 5 times [2022-02-14 21:24:08,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:24:08,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157099636] [2022-02-14 21:24:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:24:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:24:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:24:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:24:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:24:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 597 proven. 2667 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-14 21:24:09,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:24:09,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157099636] [2022-02-14 21:24:09,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157099636] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:24:09,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46593155] [2022-02-14 21:24:09,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 21:24:09,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:24:09,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:24:09,811 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) [2022-02-14 21:24:09,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 21:28:03,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2022-02-14 21:28:03,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:28:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 98 conjunts are in the unsatisfiable core [2022-02-14 21:28:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:28:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:28:05,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:28:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:28:10,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46593155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:28:10,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:28:10,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 50, 50] total 142 [2022-02-14 21:28:10,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930227316] [2022-02-14 21:28:10,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:28:10,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-14 21:28:10,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:28:10,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-14 21:28:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4778, Invalid=15244, Unknown=0, NotChecked=0, Total=20022 [2022-02-14 21:28:10,034 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 142 states, 142 states have (on average 2.964788732394366) internal successors, (421), 141 states have internal predecessors, (421), 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)