/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/array-examples/standard_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:38:35,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:38:35,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:38:35,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:38:35,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:38:35,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:38:35,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:38:35,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:38:35,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:38:35,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:38:35,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:38:35,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:38:35,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:38:35,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:38:35,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:38:35,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:38:35,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:38:35,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:38:35,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:38:35,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:38:35,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:38:35,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:38:35,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:38:35,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:38:35,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:38:35,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:38:35,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:38:35,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:38:35,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:38:35,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:38:35,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:38:35,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:38:35,165 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:38:35,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:38:35,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:38:35,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:38:35,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:38:35,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:38:35,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:38:35,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:38:35,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:38:35,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:38:35,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:38:35,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:38:35,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:38:35,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:38:35,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:38:35,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:38:35,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:38:35,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:38:35,168 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:38:35,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:38:35,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:38:35,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:38:35,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:38:35,371 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:38:35,372 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:38:35,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2022-01-31 07:38:35,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e74cefb/65449dfab8ce4de4b0b276ab2184d242/FLAG62afd8752 [2022-01-31 07:38:35,823 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:38:35,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2022-01-31 07:38:35,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e74cefb/65449dfab8ce4de4b0b276ab2184d242/FLAG62afd8752 [2022-01-31 07:38:35,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e74cefb/65449dfab8ce4de4b0b276ab2184d242 [2022-01-31 07:38:35,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:38:35,840 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:38:35,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:38:35,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:38:35,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:38:35,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:38:35" (1/1) ... [2022-01-31 07:38:35,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfaf85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:35, skipping insertion in model container [2022-01-31 07:38:35,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:38:35" (1/1) ... [2022-01-31 07:38:35,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:38:35,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:38:35,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i[816,829] [2022-01-31 07:38:36,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:38:36,049 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:38:36,058 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i[816,829] [2022-01-31 07:38:36,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:38:36,081 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:38:36,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36 WrapperNode [2022-01-31 07:38:36,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:38:36,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:38:36,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:38:36,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:38:36,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:38:36,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:38:36,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:38:36,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:38:36,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:38:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:36,151 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) [2022-01-31 07:38:36,196 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 [2022-01-31 07:38:36,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:38:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:38:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:38:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:38:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:38:36,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:38:36,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:38:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:38:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:38:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:38:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:38:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:38:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:38:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:38:36,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:38:36,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:38:36,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:38:36,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:38:36,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:38:36,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:38:36,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:38:36,312 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:38:36,313 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:38:36,543 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:38:36,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:38:36,548 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-31 07:38:36,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:36 BoogieIcfgContainer [2022-01-31 07:38:36,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:38:36,550 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:38:36,550 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:38:36,554 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:38:36,566 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:36" (1/1) ... [2022-01-31 07:38:36,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:38:36 BasicIcfg [2022-01-31 07:38:36,587 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:38:36,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:38:36,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:38:36,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:38:36,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:38:35" (1/4) ... [2022-01-31 07:38:36,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c31f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:38:36, skipping insertion in model container [2022-01-31 07:38:36,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:38:36" (2/4) ... [2022-01-31 07:38:36,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c31f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:38:36, skipping insertion in model container [2022-01-31 07:38:36,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:38:36" (3/4) ... [2022-01-31 07:38:36,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c31f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:38:36, skipping insertion in model container [2022-01-31 07:38:36,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:38:36" (4/4) ... [2022-01-31 07:38:36,602 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.iJordan [2022-01-31 07:38:36,606 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:38:36,606 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:38:36,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:38:36,678 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:38:36,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:38:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 38 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:38:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 07:38:36,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:36,710 INFO L514 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, 1, 1, 1] [2022-01-31 07:38:36,710 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash 728163296, now seen corresponding path program 1 times [2022-01-31 07:38:36,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:36,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919501289] [2022-01-31 07:38:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:36,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:36,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:38:36,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:36,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919501289] [2022-01-31 07:38:36,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919501289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:36,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:38:36,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:38:36,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276743239] [2022-01-31 07:38:36,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:36,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:38:36,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:38:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:38:37,002 INFO L87 Difference]: Start difference. First operand has 45 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 38 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:37,031 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-01-31 07:38:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:38:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 07:38:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:37,045 INFO L225 Difference]: With dead ends: 45 [2022-01-31 07:38:37,045 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 07:38:37,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:38:37,050 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:37,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 55 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 07:38:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 07:38:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:38:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-31 07:38:37,076 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2022-01-31 07:38:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:37,076 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-31 07:38:37,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-31 07:38:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 07:38:37,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:37,078 INFO L514 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, 1, 1, 1] [2022-01-31 07:38:37,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:38:37,078 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1407711001, now seen corresponding path program 1 times [2022-01-31 07:38:37,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15409865] [2022-01-31 07:38:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:37,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:38:37,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:37,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15409865] [2022-01-31 07:38:37,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15409865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:37,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:38:37,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:38:37,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831634918] [2022-01-31 07:38:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:37,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:38:37,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:38:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:38:37,184 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:37,250 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-01-31 07:38:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:38:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 07:38:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:37,253 INFO L225 Difference]: With dead ends: 42 [2022-01-31 07:38:37,253 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 07:38:37,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:38:37,256 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:37,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 07:38:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 07:38:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:38:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-01-31 07:38:37,261 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2022-01-31 07:38:37,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:37,261 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-01-31 07:38:37,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:37,261 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-01-31 07:38:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 07:38:37,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:37,262 INFO L514 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, 1, 1, 1, 1, 1] [2022-01-31 07:38:37,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:38:37,262 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1597997189, now seen corresponding path program 1 times [2022-01-31 07:38:37,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185025465] [2022-01-31 07:38:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:37,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:38:37,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185025465] [2022-01-31 07:38:37,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185025465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118495507] [2022-01-31 07:38:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:37,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:37,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:37,347 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) [2022-01-31 07:38:37,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 07:38:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:38:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:38:37,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:38:37,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118495507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:38:37,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:38:37,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:38:37,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460160154] [2022-01-31 07:38:37,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:38:37,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:38:37,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:37,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:38:37,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:38:37,553 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:37,589 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-01-31 07:38:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:38:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 07:38:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:37,590 INFO L225 Difference]: With dead ends: 55 [2022-01-31 07:38:37,590 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 07:38:37,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:38:37,591 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:37,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:38:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 07:38:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-01-31 07:38:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:38:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-01-31 07:38:37,595 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2022-01-31 07:38:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:37,595 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-01-31 07:38:37,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-01-31 07:38:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 07:38:37,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:37,596 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:37,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 07:38:37,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:37,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash 867775063, now seen corresponding path program 1 times [2022-01-31 07:38:37,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:37,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119681324] [2022-01-31 07:38:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:37,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 07:38:37,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:37,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119681324] [2022-01-31 07:38:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119681324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:37,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388051726] [2022-01-31 07:38:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:37,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:37,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:37,888 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) [2022-01-31 07:38:37,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 07:38:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:37,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:38:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 07:38:38,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 07:38:38,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388051726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:38,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:38,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:38:38,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600728038] [2022-01-31 07:38:38,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:38,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:38:38,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:38:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:38:38,156 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:38,269 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-01-31 07:38:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:38:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 07:38:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:38,270 INFO L225 Difference]: With dead ends: 54 [2022-01-31 07:38:38,270 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 07:38:38,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:38:38,271 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:38,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 57 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 07:38:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 07:38:38,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:38:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-01-31 07:38:38,275 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2022-01-31 07:38:38,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:38,276 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-01-31 07:38:38,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-01-31 07:38:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 07:38:38,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:38,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:38,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 07:38:38,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 07:38:38,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash -334022991, now seen corresponding path program 2 times [2022-01-31 07:38:38,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:38,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160398106] [2022-01-31 07:38:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:38,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:38,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 07:38:38,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160398106] [2022-01-31 07:38:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160398106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943689825] [2022-01-31 07:38:38,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:38:38,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:38,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:38,572 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) [2022-01-31 07:38:38,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 07:38:38,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:38:38,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:38:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 07:38:38,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 07:38:38,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943689825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:38,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:38,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:38:38,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828856554] [2022-01-31 07:38:38,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:38:38,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:38:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:38:38,796 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:38,965 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-01-31 07:38:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:38:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 07:38:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:38,966 INFO L225 Difference]: With dead ends: 96 [2022-01-31 07:38:38,966 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 07:38:38,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:38:38,969 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 104 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:38,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 50 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 07:38:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-31 07:38:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:38:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-01-31 07:38:38,975 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 49 [2022-01-31 07:38:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:38,975 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-01-31 07:38:38,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-01-31 07:38:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 07:38:38,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:38,977 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:38,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 07:38:39,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:39,196 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1857245529, now seen corresponding path program 3 times [2022-01-31 07:38:39,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:39,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328186944] [2022-01-31 07:38:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:39,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:39,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 07:38:39,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:39,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328186944] [2022-01-31 07:38:39,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328186944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:39,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519768415] [2022-01-31 07:38:39,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:38:39,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:39,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:39,326 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) [2022-01-31 07:38:39,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 07:38:40,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 07:38:40,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:40,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:38:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 07:38:40,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 07:38:40,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519768415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:40,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:40,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-31 07:38:40,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814075647] [2022-01-31 07:38:40,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:40,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 07:38:40,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 07:38:40,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-31 07:38:40,759 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 17 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:41,177 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2022-01-31 07:38:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 07:38:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 17 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 07:38:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:41,179 INFO L225 Difference]: With dead ends: 183 [2022-01-31 07:38:41,179 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 07:38:41,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 07:38:41,180 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 333 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:41,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 48 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:38:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 07:38:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-01-31 07:38:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0511363636363635) internal successors, (185), 176 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:38:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 190 transitions. [2022-01-31 07:38:41,189 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 190 transitions. Word has length 91 [2022-01-31 07:38:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:41,189 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 190 transitions. [2022-01-31 07:38:41,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 17 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 190 transitions. [2022-01-31 07:38:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 07:38:41,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:41,191 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:41,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 07:38:41,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:41,412 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash 246964401, now seen corresponding path program 4 times [2022-01-31 07:38:41,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688389377] [2022-01-31 07:38:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:41,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:41,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-01-31 07:38:41,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:41,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688389377] [2022-01-31 07:38:41,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688389377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:41,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812425621] [2022-01-31 07:38:41,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:38:41,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:41,558 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) [2022-01-31 07:38:41,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 07:38:41,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:38:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:38:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 07:38:41,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:38:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-01-31 07:38:41,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:38:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-01-31 07:38:42,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812425621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:38:42,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:38:42,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 07:38:42,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148212573] [2022-01-31 07:38:42,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:38:42,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 07:38:42,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:38:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 07:38:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:38:42,165 INFO L87 Difference]: Start difference. First operand 182 states and 190 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:38:42,321 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2022-01-31 07:38:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:38:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 07:38:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:38:42,322 INFO L225 Difference]: With dead ends: 196 [2022-01-31 07:38:42,322 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 07:38:42,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:38:42,323 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:38:42,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:38:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 07:38:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-01-31 07:38:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0473684210526315) internal successors, (199), 190 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:38:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 204 transitions. [2022-01-31 07:38:42,330 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 204 transitions. Word has length 177 [2022-01-31 07:38:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:38:42,331 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 204 transitions. [2022-01-31 07:38:42,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:38:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 204 transitions. [2022-01-31 07:38:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 07:38:42,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:38:42,332 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:38:42,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 07:38:42,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:42,565 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:38:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:38:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 437614339, now seen corresponding path program 5 times [2022-01-31 07:38:42,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:38:42,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919445897] [2022-01-31 07:38:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:38:42,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:38:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:42,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:38:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:38:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-01-31 07:38:42,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:38:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919445897] [2022-01-31 07:38:42,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919445897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:38:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845467812] [2022-01-31 07:38:42,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:38:42,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:38:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:38:42,821 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) [2022-01-31 07:38:42,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process