/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 05:29:12,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 05:29:12,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 05:29:12,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 05:29:12,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 05:29:12,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 05:29:12,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 05:29:12,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 05:29:12,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 05:29:12,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 05:29:12,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 05:29:12,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 05:29:12,129 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 05:29:12,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 05:29:12,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 05:29:12,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 05:29:12,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 05:29:12,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 05:29:12,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 05:29:12,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 05:29:12,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 05:29:12,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 05:29:12,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 05:29:12,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 05:29:12,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 05:29:12,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 05:29:12,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 05:29:12,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 05:29:12,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 05:29:12,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 05:29:12,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 05:29:12,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 05:29:12,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 05:29:12,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 05:29:12,165 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 05:29:12,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 05:29:12,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 05:29:12,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 05:29:12,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 05:29:12,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 05:29:12,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:29:12,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 05:29:12,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 05:29:12,168 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 05:29:12,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 05:29:12,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 05:29:12,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 05:29:12,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 05:29:12,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 05:29:12,432 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 05:29:12,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-04-06 05:29:12,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811a6b6b2/4800499c9b8b401a8b51744c306d24f9/FLAG74468a13b [2022-04-06 05:29:12,916 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 05:29:12,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-04-06 05:29:12,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811a6b6b2/4800499c9b8b401a8b51744c306d24f9/FLAG74468a13b [2022-04-06 05:29:12,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811a6b6b2/4800499c9b8b401a8b51744c306d24f9 [2022-04-06 05:29:12,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 05:29:12,937 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 05:29:12,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 05:29:12,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 05:29:12,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 05:29:12,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:29:12" (1/1) ... [2022-04-06 05:29:12,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3b5c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:12, skipping insertion in model container [2022-04-06 05:29:12,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:29:12" (1/1) ... [2022-04-06 05:29:12,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 05:29:12,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 05:29:13,108 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-04-06 05:29:13,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:29:13,131 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 05:29:13,140 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c[465,478] [2022-04-06 05:29:13,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 05:29:13,157 INFO L208 MainTranslator]: Completed translation [2022-04-06 05:29:13,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13 WrapperNode [2022-04-06 05:29:13,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 05:29:13,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 05:29:13,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 05:29:13,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 05:29:13,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 05:29:13,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 05:29:13,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 05:29:13,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 05:29:13,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 05:29:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:13,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 05:29:13,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 05:29:13,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 05:29:13,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 05:29:13,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 05:29:13,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 05:29:13,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 05:29:13,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 05:29:13,265 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 05:29:13,265 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 05:29:13,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 05:29:13,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 05:29:13,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 05:29:13,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 05:29:13,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 05:29:13,318 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 05:29:13,319 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 05:29:13,480 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 05:29:13,486 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 05:29:13,487 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 05:29:13,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:29:13 BoogieIcfgContainer [2022-04-06 05:29:13,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 05:29:13,490 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 05:29:13,490 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 05:29:13,491 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 05:29:13,499 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:29:13" (1/1) ... [2022-04-06 05:29:13,501 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 05:29:13,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:29:13 BasicIcfg [2022-04-06 05:29:13,521 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 05:29:13,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 05:29:13,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 05:29:13,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 05:29:13,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:29:12" (1/4) ... [2022-04-06 05:29:13,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412b46a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:29:13, skipping insertion in model container [2022-04-06 05:29:13,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:13" (2/4) ... [2022-04-06 05:29:13,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412b46a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:29:13, skipping insertion in model container [2022-04-06 05:29:13,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:29:13" (3/4) ... [2022-04-06 05:29:13,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412b46a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:29:13, skipping insertion in model container [2022-04-06 05:29:13,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 05:29:13" (4/4) ... [2022-04-06 05:29:13,533 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.cJordan [2022-04-06 05:29:13,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 05:29:13,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 05:29:13,575 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 05:29:13,581 INFO L340 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 [2022-04-06 05:29:13,581 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 05:29:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 05:29:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 05:29:13,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:13,602 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:13,602 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash -414317756, now seen corresponding path program 1 times [2022-04-06 05:29:13,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:13,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766420846] [2022-04-06 05:29:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:13,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:13,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:13,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:13,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:13,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766420846] [2022-04-06 05:29:13,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766420846] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:29:13,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:29:13,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 05:29:13,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080173069] [2022-04-06 05:29:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:29:13,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 05:29:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 05:29:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:29:13,804 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:13,870 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-04-06 05:29:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 05:29:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-06 05:29:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:13,878 INFO L225 Difference]: With dead ends: 27 [2022-04-06 05:29:13,878 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 05:29:13,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 05:29:13,883 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:13,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:29:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 05:29:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 05:29:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 05:29:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-06 05:29:13,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-04-06 05:29:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:13,912 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-06 05:29:13,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-06 05:29:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 05:29:13,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:13,914 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:13,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 05:29:13,914 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1035089572, now seen corresponding path program 1 times [2022-04-06 05:29:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:13,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788384210] [2022-04-06 05:29:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:14,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788384210] [2022-04-06 05:29:14,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788384210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:29:14,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:29:14,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 05:29:14,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775508243] [2022-04-06 05:29:14,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:29:14,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 05:29:14,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:14,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 05:29:14,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 05:29:14,044 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 05:29:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:14,144 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-04-06 05:29:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:29:14,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-04-06 05:29:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:14,146 INFO L225 Difference]: With dead ends: 31 [2022-04-06 05:29:14,146 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 05:29:14,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 05:29:14,147 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:14,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:29:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 05:29:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-04-06 05:29:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 05:29:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-04-06 05:29:14,154 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2022-04-06 05:29:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:14,154 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-04-06 05:29:14,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 05:29:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-06 05:29:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 05:29:14,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:14,155 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:14,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 05:29:14,156 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2124918270, now seen corresponding path program 1 times [2022-04-06 05:29:14,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:14,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66527651] [2022-04-06 05:29:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:14,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:29:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66527651] [2022-04-06 05:29:14,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66527651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:29:14,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:29:14,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 05:29:14,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618444270] [2022-04-06 05:29:14,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:29:14,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 05:29:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 05:29:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:29:14,252 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:14,325 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-04-06 05:29:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 05:29:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-04-06 05:29:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:14,339 INFO L225 Difference]: With dead ends: 33 [2022-04-06 05:29:14,340 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 05:29:14,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:29:14,341 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:14,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:29:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 05:29:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-04-06 05:29:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 05:29:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-06 05:29:14,349 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-04-06 05:29:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:14,349 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-06 05:29:14,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-06 05:29:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 05:29:14,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:14,350 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:14,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 05:29:14,351 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1237414589, now seen corresponding path program 1 times [2022-04-06 05:29:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695604529] [2022-04-06 05:29:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 05:29:14,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695604529] [2022-04-06 05:29:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695604529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:29:14,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:29:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 05:29:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525747032] [2022-04-06 05:29:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:29:14,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:29:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:29:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 05:29:14,494 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 05:29:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:14,612 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-04-06 05:29:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:29:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-06 05:29:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:14,614 INFO L225 Difference]: With dead ends: 40 [2022-04-06 05:29:14,614 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 05:29:14,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 05:29:14,616 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:14,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:29:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 05:29:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 05:29:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 05:29:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-04-06 05:29:14,623 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-04-06 05:29:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:14,624 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-04-06 05:29:14,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 05:29:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-04-06 05:29:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 05:29:14,625 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:14,625 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:14,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 05:29:14,625 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1236491068, now seen corresponding path program 1 times [2022-04-06 05:29:14,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:14,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648378448] [2022-04-06 05:29:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:14,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648378448] [2022-04-06 05:29:14,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648378448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133874403] [2022-04-06 05:29:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:14,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:14,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:14,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:14,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 05:29:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 05:29:14,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:14,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:29:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:15,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133874403] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:29:15,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:29:15,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-04-06 05:29:15,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189410521] [2022-04-06 05:29:15,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:29:15,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 05:29:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 05:29:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-06 05:29:15,093 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:15,217 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-04-06 05:29:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 05:29:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2022-04-06 05:29:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:15,219 INFO L225 Difference]: With dead ends: 59 [2022-04-06 05:29:15,219 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 05:29:15,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-04-06 05:29:15,224 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:15,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:29:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 05:29:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 05:29:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 05:29:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-04-06 05:29:15,242 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 24 [2022-04-06 05:29:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:15,242 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-04-06 05:29:15,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-04-06 05:29:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 05:29:15,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:15,244 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:15,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:15,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:15,469 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 575066086, now seen corresponding path program 2 times [2022-04-06 05:29:15,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:15,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998983248] [2022-04-06 05:29:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:15,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:15,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:15,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998983248] [2022-04-06 05:29:15,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998983248] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837576914] [2022-04-06 05:29:15,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:29:15,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:15,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:15,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:15,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 05:29:15,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:29:15,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:29:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 05:29:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 05:29:15,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:29:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 05:29:15,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837576914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:29:15,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:29:15,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-04-06 05:29:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873078269] [2022-04-06 05:29:15,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:29:15,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 05:29:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 05:29:15,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 05:29:15,840 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 05:29:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:16,201 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2022-04-06 05:29:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 05:29:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-04-06 05:29:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:16,204 INFO L225 Difference]: With dead ends: 110 [2022-04-06 05:29:16,204 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 05:29:16,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2022-04-06 05:29:16,206 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:16,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 41 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 05:29:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 05:29:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2022-04-06 05:29:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 88 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 05:29:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-04-06 05:29:16,215 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 33 [2022-04-06 05:29:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:16,215 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-04-06 05:29:16,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 05:29:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-04-06 05:29:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 05:29:16,217 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:16,217 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:16,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:16,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 05:29:16,439 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1861776890, now seen corresponding path program 1 times [2022-04-06 05:29:16,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:16,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311432921] [2022-04-06 05:29:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 05:29:16,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311432921] [2022-04-06 05:29:16,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311432921] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:29:16,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:29:16,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 05:29:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61220825] [2022-04-06 05:29:16,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:29:16,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 05:29:16,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:16,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 05:29:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:29:16,506 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:16,549 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2022-04-06 05:29:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 05:29:16,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-04-06 05:29:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:16,551 INFO L225 Difference]: With dead ends: 144 [2022-04-06 05:29:16,551 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 05:29:16,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:29:16,552 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:16,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 51 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:29:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 05:29:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2022-04-06 05:29:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 123 states have internal predecessors, (163), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 05:29:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2022-04-06 05:29:16,561 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 39 [2022-04-06 05:29:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:16,561 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2022-04-06 05:29:16,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2022-04-06 05:29:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 05:29:16,562 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:16,562 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:16,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 05:29:16,563 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1666296505, now seen corresponding path program 1 times [2022-04-06 05:29:16,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:16,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74712010] [2022-04-06 05:29:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:16,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 05:29:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74712010] [2022-04-06 05:29:16,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74712010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:29:16,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 05:29:16,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 05:29:16,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200797811] [2022-04-06 05:29:16,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:29:16,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 05:29:16,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 05:29:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:29:16,604 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:16,643 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-04-06 05:29:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 05:29:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-04-06 05:29:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:16,644 INFO L225 Difference]: With dead ends: 144 [2022-04-06 05:29:16,644 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 05:29:16,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 05:29:16,645 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:16,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:29:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 05:29:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2022-04-06 05:29:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 127 states have internal predecessors, (167), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 05:29:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2022-04-06 05:29:16,655 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 40 [2022-04-06 05:29:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:16,655 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2022-04-06 05:29:16,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2022-04-06 05:29:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 05:29:16,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:16,657 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:16,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 05:29:16,657 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1695849177, now seen corresponding path program 1 times [2022-04-06 05:29:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:16,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866256129] [2022-04-06 05:29:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:16,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866256129] [2022-04-06 05:29:16,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866256129] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:16,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317903771] [2022-04-06 05:29:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:16,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:16,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 05:29:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:16,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 05:29:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:17,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:29:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:17,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317903771] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:29:17,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:29:17,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-04-06 05:29:17,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599846604] [2022-04-06 05:29:17,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:29:17,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 05:29:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 05:29:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-04-06 05:29:17,218 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:17,428 INFO L93 Difference]: Finished difference Result 258 states and 339 transitions. [2022-04-06 05:29:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 05:29:17,429 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-04-06 05:29:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:17,430 INFO L225 Difference]: With dead ends: 258 [2022-04-06 05:29:17,430 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 05:29:17,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=399, Invalid=723, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 05:29:17,432 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:17,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 28 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 05:29:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 05:29:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-04-06 05:29:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 246 states have (on average 1.329268292682927) internal successors, (327), 247 states have internal predecessors, (327), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 05:29:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 338 transitions. [2022-04-06 05:29:17,441 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 338 transitions. Word has length 40 [2022-04-06 05:29:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:17,442 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 338 transitions. [2022-04-06 05:29:17,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 338 transitions. [2022-04-06 05:29:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 05:29:17,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:17,444 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:17,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:17,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:17,662 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash 150253017, now seen corresponding path program 2 times [2022-04-06 05:29:17,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:17,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358485316] [2022-04-06 05:29:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:17,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:17,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:17,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:17,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:17,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358485316] [2022-04-06 05:29:17,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358485316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:17,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010959303] [2022-04-06 05:29:17,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:29:17,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:17,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:17,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:17,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 05:29:17,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:29:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:29:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 05:29:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 05:29:18,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:29:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 05:29:18,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010959303] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:29:18,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:29:18,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 26 [2022-04-06 05:29:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56754375] [2022-04-06 05:29:18,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:29:18,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 05:29:18,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 05:29:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2022-04-06 05:29:18,373 INFO L87 Difference]: Start difference. First operand 257 states and 338 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:19,609 INFO L93 Difference]: Finished difference Result 1062 states and 1392 transitions. [2022-04-06 05:29:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 05:29:19,609 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2022-04-06 05:29:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:19,614 INFO L225 Difference]: With dead ends: 1062 [2022-04-06 05:29:19,614 INFO L226 Difference]: Without dead ends: 1062 [2022-04-06 05:29:19,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1752, Invalid=4568, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 05:29:19,617 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 429 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:19,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 40 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 05:29:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-04-06 05:29:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 524. [2022-04-06 05:29:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 507 states have (on average 1.331360946745562) internal successors, (675), 508 states have internal predecessors, (675), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 05:29:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 694 transitions. [2022-04-06 05:29:19,634 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 694 transitions. Word has length 64 [2022-04-06 05:29:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:19,634 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 694 transitions. [2022-04-06 05:29:19,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 694 transitions. [2022-04-06 05:29:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 05:29:19,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:19,636 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:19,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:19,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:19,864 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash -110856328, now seen corresponding path program 1 times [2022-04-06 05:29:19,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565975735] [2022-04-06 05:29:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:19,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:20,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:20,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:20,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:20,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565975735] [2022-04-06 05:29:20,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565975735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:20,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22044142] [2022-04-06 05:29:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:20,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:20,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:20,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:20,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 05:29:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 05:29:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:20,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:29:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:21,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22044142] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:29:21,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:29:21,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-04-06 05:29:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994146746] [2022-04-06 05:29:21,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:29:21,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 05:29:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 05:29:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=1779, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 05:29:21,219 INFO L87 Difference]: Start difference. First operand 524 states and 694 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:21,903 INFO L93 Difference]: Finished difference Result 3382 states and 4457 transitions. [2022-04-06 05:29:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 05:29:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-04-06 05:29:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:21,917 INFO L225 Difference]: With dead ends: 3382 [2022-04-06 05:29:21,918 INFO L226 Difference]: Without dead ends: 3382 [2022-04-06 05:29:21,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1969, Invalid=3433, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 05:29:21,920 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:21,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 32 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 05:29:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2022-04-06 05:29:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1107. [2022-04-06 05:29:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1090 states have (on average 1.3293577981651377) internal successors, (1449), 1091 states have internal predecessors, (1449), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 05:29:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1468 transitions. [2022-04-06 05:29:21,957 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1468 transitions. Word has length 70 [2022-04-06 05:29:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:21,958 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1468 transitions. [2022-04-06 05:29:21,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1468 transitions. [2022-04-06 05:29:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 05:29:21,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:21,961 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:21,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:22,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 05:29:22,172 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1335274040, now seen corresponding path program 2 times [2022-04-06 05:29:22,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:22,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112924180] [2022-04-06 05:29:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:22,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:22,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:22,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112924180] [2022-04-06 05:29:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112924180] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:22,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666904273] [2022-04-06 05:29:22,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:29:22,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:22,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:22,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 05:29:22,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:29:22,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:29:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 05:29:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:24,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:29:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:25,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666904273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:29:25,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:29:25,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 110 [2022-04-06 05:29:25,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184056109] [2022-04-06 05:29:25,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:29:25,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 05:29:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 05:29:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5189, Invalid=6801, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 05:29:25,718 INFO L87 Difference]: Start difference. First operand 1107 states and 1468 transitions. Second operand has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:27,732 INFO L93 Difference]: Finished difference Result 6154 states and 8129 transitions. [2022-04-06 05:29:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 05:29:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 124 [2022-04-06 05:29:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:27,752 INFO L225 Difference]: With dead ends: 6154 [2022-04-06 05:29:27,753 INFO L226 Difference]: Without dead ends: 6154 [2022-04-06 05:29:27,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7556 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7819, Invalid=13351, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 05:29:27,758 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 561 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:27,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 42 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 05:29:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2022-04-06 05:29:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 2295. [2022-04-06 05:29:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2278 states have (on average 1.3314310798946445) internal successors, (3033), 2279 states have internal predecessors, (3033), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 05:29:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3052 transitions. [2022-04-06 05:29:27,824 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3052 transitions. Word has length 124 [2022-04-06 05:29:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:27,825 INFO L478 AbstractCegarLoop]: Abstraction has 2295 states and 3052 transitions. [2022-04-06 05:29:27,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3052 transitions. [2022-04-06 05:29:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-06 05:29:27,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:27,828 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:27,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:28,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:28,044 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash 872046520, now seen corresponding path program 3 times [2022-04-06 05:29:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:28,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935383043] [2022-04-06 05:29:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:28,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:30,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:30,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:30,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935383043] [2022-04-06 05:29:30,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935383043] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:30,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551077188] [2022-04-06 05:29:30,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 05:29:30,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:30,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:30,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:30,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 05:29:30,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 05:29:30,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:29:30,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 05:29:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-04-06 05:29:30,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 05:29:30,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551077188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:29:30,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:29:30,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [75] total 79 [2022-04-06 05:29:30,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240035398] [2022-04-06 05:29:30,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:29:30,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 05:29:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 05:29:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2642, Invalid=3520, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 05:29:30,636 INFO L87 Difference]: Start difference. First operand 2295 states and 3052 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:30,705 INFO L93 Difference]: Finished difference Result 1858 states and 2467 transitions. [2022-04-06 05:29:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 05:29:30,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 232 [2022-04-06 05:29:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:30,712 INFO L225 Difference]: With dead ends: 1858 [2022-04-06 05:29:30,712 INFO L226 Difference]: Without dead ends: 1858 [2022-04-06 05:29:30,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2646, Invalid=3674, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 05:29:30,715 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:30,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:29:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-04-06 05:29:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1857. [2022-04-06 05:29:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1843 states have (on average 1.3298969072164948) internal successors, (2451), 1844 states have internal predecessors, (2451), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 05:29:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2466 transitions. [2022-04-06 05:29:30,745 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2466 transitions. Word has length 232 [2022-04-06 05:29:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:30,745 INFO L478 AbstractCegarLoop]: Abstraction has 1857 states and 2466 transitions. [2022-04-06 05:29:30,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:29:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2466 transitions. [2022-04-06 05:29:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-06 05:29:30,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:30,750 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:30,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:30,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:30,964 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1465535191, now seen corresponding path program 1 times [2022-04-06 05:29:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375262326] [2022-04-06 05:29:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:32,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:32,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:32,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375262326] [2022-04-06 05:29:32,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375262326] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:32,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574822012] [2022-04-06 05:29:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:32,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:32,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:32,898 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:32,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 05:29:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 05:29:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:29:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:35,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:29:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:41,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574822012] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:29:41,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:29:41,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 218 [2022-04-06 05:29:41,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218499490] [2022-04-06 05:29:41,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:29:41,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-04-06 05:29:41,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:29:41,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-04-06 05:29:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20741, Invalid=26565, Unknown=0, NotChecked=0, Total=47306 [2022-04-06 05:29:41,279 INFO L87 Difference]: Start difference. First operand 1857 states and 2466 transitions. Second operand has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:29:48,375 INFO L93 Difference]: Finished difference Result 3802 states and 5059 transitions. [2022-04-06 05:29:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-04-06 05:29:48,379 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 232 [2022-04-06 05:29:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:29:48,391 INFO L225 Difference]: With dead ends: 3802 [2022-04-06 05:29:48,391 INFO L226 Difference]: Without dead ends: 3802 [2022-04-06 05:29:48,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30668 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=31183, Invalid=52627, Unknown=0, NotChecked=0, Total=83810 [2022-04-06 05:29:48,397 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 1738 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 05:29:48,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 31 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 05:29:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-04-06 05:29:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3801. [2022-04-06 05:29:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3787 states have (on average 1.3316609453393187) internal successors, (5043), 3788 states have internal predecessors, (5043), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 05:29:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5058 transitions. [2022-04-06 05:29:48,466 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5058 transitions. Word has length 232 [2022-04-06 05:29:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:29:48,466 INFO L478 AbstractCegarLoop]: Abstraction has 3801 states and 5058 transitions. [2022-04-06 05:29:48,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:29:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5058 transitions. [2022-04-06 05:29:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-04-06 05:29:48,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:29:48,474 INFO L499 BasicCegarLoop]: trace histogram [142, 142, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:29:48,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 05:29:48,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 05:29:48,696 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:29:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:29:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash -638197545, now seen corresponding path program 2 times [2022-04-06 05:29:48,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:29:48,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195647417] [2022-04-06 05:29:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:29:48,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:29:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:55,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:29:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:55,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:29:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:29:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:29:55,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:29:55,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195647417] [2022-04-06 05:29:55,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195647417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:29:55,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765514740] [2022-04-06 05:29:55,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 05:29:55,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:29:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:29:55,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:29:56,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 05:29:56,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 05:29:56,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:29:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 145 conjunts are in the unsatisfiable core [2022-04-06 05:29:56,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:30:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:30:04,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:30:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:30:25,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765514740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:30:25,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:30:25,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 434 [2022-04-06 05:30:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057413349] [2022-04-06 05:30:25,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:30:25,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 434 states [2022-04-06 05:30:25,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:30:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 434 interpolants. [2022-04-06 05:30:25,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82949, Invalid=104973, Unknown=0, NotChecked=0, Total=187922 [2022-04-06 05:30:25,358 INFO L87 Difference]: Start difference. First operand 3801 states and 5058 transitions. Second operand has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:31:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:31:06,989 INFO L93 Difference]: Finished difference Result 7690 states and 10243 transitions. [2022-04-06 05:31:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-04-06 05:31:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 448 [2022-04-06 05:31:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:31:07,014 INFO L225 Difference]: With dead ends: 7690 [2022-04-06 05:31:07,014 INFO L226 Difference]: Without dead ends: 7690 [2022-04-06 05:31:07,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123548 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=124567, Invalid=208939, Unknown=0, NotChecked=0, Total=333506 [2022-04-06 05:31:07,035 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 4012 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4013 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 05:31:07,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4013 Valid, 31 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 05:31:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-04-06 05:31:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7689. [2022-04-06 05:31:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7675 states have (on average 1.3325081433224755) internal successors, (10227), 7676 states have internal predecessors, (10227), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 05:31:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 10242 transitions. [2022-04-06 05:31:07,143 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 10242 transitions. Word has length 448 [2022-04-06 05:31:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:31:07,144 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 10242 transitions. [2022-04-06 05:31:07,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 05:31:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 10242 transitions. [2022-04-06 05:31:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-04-06 05:31:07,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:31:07,167 INFO L499 BasicCegarLoop]: trace histogram [286, 286, 285, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:31:07,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 05:31:07,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 05:31:07,383 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:31:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:31:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash 878120151, now seen corresponding path program 3 times [2022-04-06 05:31:07,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:31:07,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465570534] [2022-04-06 05:31:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:31:07,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:31:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:31:35,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:31:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:31:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:31:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:31:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:31:35,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:31:35,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465570534] [2022-04-06 05:31:35,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465570534] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:31:35,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627055494] [2022-04-06 05:31:35,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 05:31:35,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:31:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:31:35,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:31:35,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 05:31:35,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 05:31:35,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 05:31:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 05:31:35,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:31:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 856 proven. 0 refuted. 0 times theorem prover too weak. 121695 trivial. 0 not checked. [2022-04-06 05:31:39,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 05:31:39,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627055494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 05:31:39,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 05:31:39,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [291] total 298 [2022-04-06 05:31:39,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133647412] [2022-04-06 05:31:39,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 05:31:39,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 05:31:39,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:31:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 05:31:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41640, Invalid=46866, Unknown=0, NotChecked=0, Total=88506 [2022-04-06 05:31:39,088 INFO L87 Difference]: Start difference. First operand 7689 states and 10242 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:31:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:31:39,260 INFO L93 Difference]: Finished difference Result 10245 states and 13643 transitions. [2022-04-06 05:31:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 05:31:39,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 880 [2022-04-06 05:31:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:31:39,285 INFO L225 Difference]: With dead ends: 10245 [2022-04-06 05:31:39,286 INFO L226 Difference]: Without dead ends: 10245 [2022-04-06 05:31:39,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=41644, Invalid=47458, Unknown=0, NotChecked=0, Total=89102 [2022-04-06 05:31:39,291 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 05:31:39,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 93 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 05:31:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2022-04-06 05:31:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 10241. [2022-04-06 05:31:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10220 states have (on average 1.3322896281800392) internal successors, (13616), 10224 states have internal predecessors, (13616), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 05:31:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 13639 transitions. [2022-04-06 05:31:39,437 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 13639 transitions. Word has length 880 [2022-04-06 05:31:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:31:39,439 INFO L478 AbstractCegarLoop]: Abstraction has 10241 states and 13639 transitions. [2022-04-06 05:31:39,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 05:31:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 13639 transitions. [2022-04-06 05:31:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-04-06 05:31:39,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:31:39,460 INFO L499 BasicCegarLoop]: trace histogram [286, 286, 270, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:31:39,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 05:31:39,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 05:31:39,676 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:31:39,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:31:39,676 INFO L85 PathProgramCache]: Analyzing trace with hash -207718695, now seen corresponding path program 1 times [2022-04-06 05:31:39,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:31:39,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408448720] [2022-04-06 05:31:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:31:39,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:31:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:07,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 05:32:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:07,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 05:32:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:07,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:32:07,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408448720] [2022-04-06 05:32:07,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408448720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 05:32:07,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808123625] [2022-04-06 05:32:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:32:07,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:32:07,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:32:07,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 05:32:07,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 05:32:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 05:32:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 289 conjunts are in the unsatisfiable core [2022-04-06 05:32:07,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 05:32:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:32:38,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:33:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:33:59,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808123625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:33:59,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 05:33:59,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 290, 290] total 866 [2022-04-06 05:33:59,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079915828] [2022-04-06 05:33:59,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 05:33:59,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 866 states [2022-04-06 05:33:59,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:33:59,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 866 interpolants. [2022-04-06 05:33:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331781, Invalid=417309, Unknown=0, NotChecked=0, Total=749090 [2022-04-06 05:33:59,101 INFO L87 Difference]: Start difference. First operand 10241 states and 13639 transitions. Second operand has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5)