/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:06:30,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:06:30,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:06:30,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:06:30,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:06:30,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:06:30,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:06:30,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:06:30,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:06:30,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:06:30,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:06:30,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:06:30,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:06:30,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:06:30,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:06:30,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:06:30,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:06:30,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:06:30,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:06:30,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:06:30,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:06:30,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:06:30,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:06:30,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:06:30,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:06:30,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:06:30,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:06:30,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:06:30,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:06:30,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:06:30,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:06:30,186 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:06:30,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:06:30,186 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:06:30,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:06:30,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:06:30,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:06:30,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:06:30,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:06:30,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:06:30,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:06:30,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:06:30,188 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:06:30,188 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:06:30,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:06:30,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:06:30,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:06:30,396 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:06:30,397 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:06:30,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-02-23 16:06:30,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a59080e/dacc21309834465c824e8c693ab8bda0/FLAGa9604f32b [2022-02-23 16:06:30,809 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:06:30,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2022-02-23 16:06:30,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a59080e/dacc21309834465c824e8c693ab8bda0/FLAGa9604f32b [2022-02-23 16:06:30,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a59080e/dacc21309834465c824e8c693ab8bda0 [2022-02-23 16:06:30,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:06:30,828 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:06:30,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:06:30,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:06:30,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:06:30,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:06:30" (1/1) ... [2022-02-23 16:06:30,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1678529d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:30, skipping insertion in model container [2022-02-23 16:06:30,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:06:30" (1/1) ... [2022-02-23 16:06:30,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:06:30,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:06:30,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i[893,906] [2022-02-23 16:06:30,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:06:31,005 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:06:31,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i[893,906] [2022-02-23 16:06:31,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:06:31,036 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:06:31,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31 WrapperNode [2022-02-23 16:06:31,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:06:31,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:06:31,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:06:31,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:06:31,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:06:31,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:06:31,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:06:31,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:06:31,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:06:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:31,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 16:06:31,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 16:06:31,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:06:31,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:06:31,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:06:31,152 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:06:31,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:06:31,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:06:31,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:06:31,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:06:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 16:06:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 16:06:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:06:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:06:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:06:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:06:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 16:06:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:06:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:06:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:06:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:06:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:06:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:06:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:06:31,198 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:06:31,199 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:06:31,328 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:06:31,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:06:31,333 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 16:06:31,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:31 BoogieIcfgContainer [2022-02-23 16:06:31,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:06:31,335 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:06:31,335 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:06:31,335 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:06:31,338 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:31" (1/1) ... [2022-02-23 16:06:31,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:06:31 BasicIcfg [2022-02-23 16:06:31,349 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:06:31,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:06:31,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:06:31,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:06:31,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:06:30" (1/4) ... [2022-02-23 16:06:31,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771211ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:06:31, skipping insertion in model container [2022-02-23 16:06:31,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:06:31" (2/4) ... [2022-02-23 16:06:31,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771211ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:06:31, skipping insertion in model container [2022-02-23 16:06:31,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:06:31" (3/4) ... [2022-02-23 16:06:31,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771211ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:06:31, skipping insertion in model container [2022-02-23 16:06:31,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:06:31" (4/4) ... [2022-02-23 16:06:31,354 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.iJordan [2022-02-23 16:06:31,358 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:06:31,358 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:06:31,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:06:31,401 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 16:06:31,402 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:06:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 16:06:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 16:06:31,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:31,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:31,418 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1933732557, now seen corresponding path program 1 times [2022-02-23 16:06:31,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:31,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762004260] [2022-02-23 16:06:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:31,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:31,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:31,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:31,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762004260] [2022-02-23 16:06:31,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762004260] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:31,584 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:31,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:06:31,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884530581] [2022-02-23 16:06:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:31,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:06:31,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:06:31,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:06:31,614 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:31,685 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-02-23 16:06:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:06:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-02-23 16:06:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:31,695 INFO L225 Difference]: With dead ends: 36 [2022-02-23 16:06:31,695 INFO L226 Difference]: Without dead ends: 30 [2022-02-23 16:06:31,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:06:31,702 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:31,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:06:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-23 16:06:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-23 16:06:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 16:06:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-02-23 16:06:31,741 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2022-02-23 16:06:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:31,741 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-02-23 16:06:31,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-02-23 16:06:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-23 16:06:31,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:31,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:31,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:06:31,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash 213262551, now seen corresponding path program 1 times [2022-02-23 16:06:31,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:31,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126498130] [2022-02-23 16:06:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:31,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:31,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:31,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126498130] [2022-02-23 16:06:31,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126498130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:31,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:31,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 16:06:31,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112402624] [2022-02-23 16:06:31,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:31,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 16:06:31,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 16:06:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 16:06:31,870 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:32,046 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-02-23 16:06:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 16:06:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-02-23 16:06:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:32,048 INFO L225 Difference]: With dead ends: 34 [2022-02-23 16:06:32,048 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 16:06:32,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 16:06:32,049 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:32,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 16:06:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-23 16:06:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 16:06:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-23 16:06:32,055 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2022-02-23 16:06:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:32,055 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-23 16:06:32,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:06:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-23 16:06:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 16:06:32,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:32,056 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:32,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:06:32,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1077134525, now seen corresponding path program 1 times [2022-02-23 16:06:32,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:32,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190730987] [2022-02-23 16:06:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 16:06:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:06:32,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:32,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190730987] [2022-02-23 16:06:32,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190730987] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:32,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:32,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 16:06:32,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110805291] [2022-02-23 16:06:32,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:32,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 16:06:32,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:32,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 16:06:32,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 16:06:32,174 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:06:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:32,327 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-02-23 16:06:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 16:06:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-23 16:06:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:32,328 INFO L225 Difference]: With dead ends: 47 [2022-02-23 16:06:32,328 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 16:06:32,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 16:06:32,329 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:32,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 16:06:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-02-23 16:06:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 16:06:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-02-23 16:06:32,335 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2022-02-23 16:06:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:32,335 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-02-23 16:06:32,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:06:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-02-23 16:06:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 16:06:32,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:32,336 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:32,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 16:06:32,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:32,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2113482804, now seen corresponding path program 1 times [2022-02-23 16:06:32,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:32,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187501461] [2022-02-23 16:06:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-23 16:06:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-23 16:06:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 16:06:32,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:32,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187501461] [2022-02-23 16:06:32,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187501461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:32,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:32,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 16:06:32,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821554219] [2022-02-23 16:06:32,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:32,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 16:06:32,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:32,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 16:06:32,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 16:06:32,435 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 16:06:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:32,606 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-02-23 16:06:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 16:06:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-23 16:06:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:32,609 INFO L225 Difference]: With dead ends: 54 [2022-02-23 16:06:32,609 INFO L226 Difference]: Without dead ends: 54 [2022-02-23 16:06:32,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 16:06:32,613 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:32,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 66 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-23 16:06:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-02-23 16:06:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 16:06:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-02-23 16:06:32,619 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2022-02-23 16:06:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:32,619 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-02-23 16:06:32,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 16:06:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-02-23 16:06:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 16:06:32,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:32,620 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:32,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 16:06:32,621 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1308577884, now seen corresponding path program 1 times [2022-02-23 16:06:32,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:32,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601835548] [2022-02-23 16:06:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 16:06:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 16:06:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-23 16:06:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 16:06:32,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:32,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601835548] [2022-02-23 16:06:32,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601835548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:32,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:32,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 16:06:32,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176357289] [2022-02-23 16:06:32,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:32,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 16:06:32,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 16:06:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:06:32,714 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 16:06:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:32,917 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2022-02-23 16:06:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:06:32,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-02-23 16:06:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:32,918 INFO L225 Difference]: With dead ends: 73 [2022-02-23 16:06:32,918 INFO L226 Difference]: Without dead ends: 68 [2022-02-23 16:06:32,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-23 16:06:32,919 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:32,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:06:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-23 16:06:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-02-23 16:06:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 16:06:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-02-23 16:06:32,925 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2022-02-23 16:06:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:32,926 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-02-23 16:06:32,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 16:06:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-02-23 16:06:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 16:06:32,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:32,927 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:32,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-23 16:06:32,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1447644068, now seen corresponding path program 1 times [2022-02-23 16:06:32,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:32,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415096713] [2022-02-23 16:06:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-23 16:06:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-23 16:06:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:32,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-23 16:06:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 16:06:33,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:33,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415096713] [2022-02-23 16:06:33,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415096713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:06:33,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:06:33,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-23 16:06:33,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448924435] [2022-02-23 16:06:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:06:33,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 16:06:33,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:33,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 16:06:33,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 16:06:33,006 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 16:06:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:33,182 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-02-23 16:06:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 16:06:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-02-23 16:06:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:33,184 INFO L225 Difference]: With dead ends: 75 [2022-02-23 16:06:33,184 INFO L226 Difference]: Without dead ends: 75 [2022-02-23 16:06:33,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-23 16:06:33,185 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:33,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 56 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-23 16:06:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-02-23 16:06:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 16:06:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-02-23 16:06:33,190 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2022-02-23 16:06:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:33,190 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-02-23 16:06:33,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 16:06:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-02-23 16:06:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 16:06:33,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:33,192 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:33,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-23 16:06:33,192 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1060067119, now seen corresponding path program 1 times [2022-02-23 16:06:33,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:33,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814793695] [2022-02-23 16:06:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-23 16:06:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-23 16:06:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-23 16:06:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-23 16:06:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-23 16:06:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-23 16:06:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-23 16:06:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:06:33,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:33,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814793695] [2022-02-23 16:06:33,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814793695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:33,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468764236] [2022-02-23 16:06:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:33,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:33,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:33,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:06:33,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:06:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 16:06:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:06:33,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:06:33,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468764236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:33,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:33,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 16:06:33,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085703251] [2022-02-23 16:06:33,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:33,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:06:33,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:06:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:06:33,870 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-23 16:06:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:34,460 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-02-23 16:06:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 16:06:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 57 [2022-02-23 16:06:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:34,479 INFO L225 Difference]: With dead ends: 113 [2022-02-23 16:06:34,479 INFO L226 Difference]: Without dead ends: 100 [2022-02-23 16:06:34,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-02-23 16:06:34,482 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 118 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:34,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 70 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:06:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-23 16:06:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-02-23 16:06:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 59 states have internal predecessors, (61), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 16:06:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-02-23 16:06:34,493 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 57 [2022-02-23 16:06:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:34,493 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-02-23 16:06:34,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-23 16:06:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-02-23 16:06:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-23 16:06:34,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:34,494 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:34,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:06:34,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:34,711 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1512463065, now seen corresponding path program 1 times [2022-02-23 16:06:34,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:34,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804006230] [2022-02-23 16:06:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:34,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-23 16:06:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-23 16:06:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-23 16:06:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-23 16:06:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-23 16:06:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-23 16:06:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-23 16:06:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:06:34,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:34,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804006230] [2022-02-23 16:06:34,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804006230] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:34,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908020808] [2022-02-23 16:06:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:34,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:34,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:06:34,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:06:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:34,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 16:06:34,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:06:35,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:06:35,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908020808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:35,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:35,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2022-02-23 16:06:35,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698638109] [2022-02-23 16:06:35,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:35,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 16:06:35,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:35,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 16:06:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-23 16:06:35,160 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-23 16:06:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:35,401 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-02-23 16:06:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 16:06:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 59 [2022-02-23 16:06:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:35,403 INFO L225 Difference]: With dead ends: 96 [2022-02-23 16:06:35,403 INFO L226 Difference]: Without dead ends: 96 [2022-02-23 16:06:35,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-02-23 16:06:35,404 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:35,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 71 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:06:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-23 16:06:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-23 16:06:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 62 states have internal predecessors, (64), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 16:06:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-02-23 16:06:35,410 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 59 [2022-02-23 16:06:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:35,410 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-02-23 16:06:35,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 8 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-02-23 16:06:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-02-23 16:06:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-23 16:06:35,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:35,412 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:35,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:06:35,647 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,SelfDestructingSolverStorable7 [2022-02-23 16:06:35,648 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1765383868, now seen corresponding path program 2 times [2022-02-23 16:06:35,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:35,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978717167] [2022-02-23 16:06:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:35,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-23 16:06:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-23 16:06:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-23 16:06:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-23 16:06:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-23 16:06:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-23 16:06:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-23 16:06:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-23 16:06:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-23 16:06:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-23 16:06:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-23 16:06:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-02-23 16:06:35,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:35,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978717167] [2022-02-23 16:06:35,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978717167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:35,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634404620] [2022-02-23 16:06:35,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:06:35,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:35,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:35,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:06:35,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:06:35,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:06:35,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:06:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 16:06:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 16:06:36,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 16:06:36,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634404620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:36,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:36,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-23 16:06:36,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154670046] [2022-02-23 16:06:36,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:36,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-23 16:06:36,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-23 16:06:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-23 16:06:36,361 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-02-23 16:06:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:37,092 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2022-02-23 16:06:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-23 16:06:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) Word has length 84 [2022-02-23 16:06:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:37,094 INFO L225 Difference]: With dead ends: 111 [2022-02-23 16:06:37,094 INFO L226 Difference]: Without dead ends: 111 [2022-02-23 16:06:37,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=479, Invalid=1971, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 16:06:37,095 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:37,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 92 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:06:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-23 16:06:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2022-02-23 16:06:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 65 states have internal predecessors, (67), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 16:06:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-02-23 16:06:37,101 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 84 [2022-02-23 16:06:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:37,101 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-02-23 16:06:37,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-02-23 16:06:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-02-23 16:06:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-23 16:06:37,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:06:37,103 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:37,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 16:06:37,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:37,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:06:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:06:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash 446349519, now seen corresponding path program 2 times [2022-02-23 16:06:37,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:06:37,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317271133] [2022-02-23 16:06:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:06:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:06:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:06:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-23 16:06:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-23 16:06:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-23 16:06:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-23 16:06:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-23 16:06:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-23 16:06:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-23 16:06:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-23 16:06:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-23 16:06:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-02-23 16:06:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-02-23 16:06:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-23 16:06:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-23 16:06:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-02-23 16:06:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-23 16:06:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:06:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-02-23 16:06:37,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:06:37,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317271133] [2022-02-23 16:06:37,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317271133] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:06:37,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988235307] [2022-02-23 16:06:37,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:06:37,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:37,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:06:37,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:06:37,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:06:37,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:06:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:06:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 16:06:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:06:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-02-23 16:06:37,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:06:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-02-23 16:06:38,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988235307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:06:38,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:06:38,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-02-23 16:06:38,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698917992] [2022-02-23 16:06:38,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:06:38,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 16:06:38,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:06:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 16:06:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-23 16:06:38,067 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-02-23 16:06:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:06:38,331 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2022-02-23 16:06:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 16:06:38,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-02-23 16:06:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:06:38,332 INFO L225 Difference]: With dead ends: 98 [2022-02-23 16:06:38,332 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 16:06:38,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 240 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-02-23 16:06:38,333 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:06:38,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:06:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 16:06:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 16:06:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 16:06:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 16:06:38,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2022-02-23 16:06:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:06:38,334 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 16:06:38,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-02-23 16:06:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 16:06:38,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 16:06:38,336 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 16:06:38,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 16:06:38,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:06:38,539 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-02-23 16:06:38,540 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 16:06:38,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:06:38 BasicIcfg [2022-02-23 16:06:38,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 16:06:38,542 INFO L158 Benchmark]: Toolchain (without parser) took 7714.26ms. Allocated memory was 198.2MB in the beginning and 253.8MB in the end (delta: 55.6MB). Free memory was 149.9MB in the beginning and 154.4MB in the end (delta: -4.5MB). Peak memory consumption was 51.2MB. Max. memory is 8.0GB. [2022-02-23 16:06:38,542 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory was 166.1MB in the beginning and 165.9MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 16:06:38,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.49ms. Allocated memory is still 198.2MB. Free memory was 149.6MB in the beginning and 175.3MB in the end (delta: -25.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 16:06:38,543 INFO L158 Benchmark]: Boogie Preprocessor took 38.11ms. Allocated memory is still 198.2MB. Free memory was 175.3MB in the beginning and 173.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 16:06:38,543 INFO L158 Benchmark]: RCFGBuilder took 258.04ms. Allocated memory is still 198.2MB. Free memory was 173.7MB in the beginning and 162.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 16:06:38,543 INFO L158 Benchmark]: IcfgTransformer took 14.92ms. Allocated memory is still 198.2MB. Free memory was 162.7MB in the beginning and 161.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 16:06:38,543 INFO L158 Benchmark]: TraceAbstraction took 7191.32ms. Allocated memory was 198.2MB in the beginning and 253.8MB in the end (delta: 55.6MB). Free memory was 160.6MB in the beginning and 154.4MB in the end (delta: 6.2MB). Peak memory consumption was 63.1MB. Max. memory is 8.0GB. [2022-02-23 16:06:38,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory was 166.1MB in the beginning and 165.9MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.49ms. Allocated memory is still 198.2MB. Free memory was 149.6MB in the beginning and 175.3MB in the end (delta: -25.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.11ms. Allocated memory is still 198.2MB. Free memory was 175.3MB in the beginning and 173.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 258.04ms. Allocated memory is still 198.2MB. Free memory was 173.7MB in the beginning and 162.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.92ms. Allocated memory is still 198.2MB. Free memory was 162.7MB in the beginning and 161.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 7191.32ms. Allocated memory was 198.2MB in the beginning and 253.8MB in the end (delta: 55.6MB). Free memory was 160.6MB in the beginning and 154.4MB in the end (delta: 6.2MB). Peak memory consumption was 63.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 676 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 668 mSDsluCounter, 600 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 301 mSDsCounter, 927 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2556 IncrementalHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 927 mSolverCounterUnsat, 299 mSDtfsCounter, 2556 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 893 GetRequests, 699 SyntacticMatches, 14 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 761 NumberOfCodeBlocks, 761 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1050 ConstructedInterpolants, 0 QuantifiedInterpolants, 3625 SizeOfPredicates, 16 NumberOfNonLiveVariables, 688 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2730/2923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 16:06:38,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...