/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/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:23:40,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:23:40,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:23:40,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 07:23:40,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:23:40,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:23:40,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:23:40,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:23:40,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:23:40,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:23:40,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:23:40,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:23:40,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:23:40,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:23:40,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:23:40,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:23:40,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:23:40,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:23:40,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:23:40,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:23:40,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:23:40,211 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:23:40,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:23:40,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:23:40,212 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:23:40,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:23:40,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:23:40,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:23:40,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:23:40,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:23:40,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:23:40,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:23:40,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:23:40,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:23:40,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:23:40,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:23:40,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:23:40,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:23:40,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:23:40,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:40,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:23:40,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:23:40,214 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:23:40,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:23:40,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:23:40,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:23:40,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:23:40,423 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:23:40,423 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:23:40,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2022-01-31 07:23:40,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c20b14e/b07626209bcc455b980829c4bcd6ba7b/FLAG14cef2df4 [2022-01-31 07:23:40,791 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:23:40,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2022-01-31 07:23:40,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c20b14e/b07626209bcc455b980829c4bcd6ba7b/FLAG14cef2df4 [2022-01-31 07:23:41,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c20b14e/b07626209bcc455b980829c4bcd6ba7b [2022-01-31 07:23:41,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:23:41,209 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:23:41,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:41,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:23:41,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:23:41,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1d1fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41, skipping insertion in model container [2022-01-31 07:23:41,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:23:41,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:23:41,364 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/sorting_selectionsort_ground-1.i[823,836] [2022-01-31 07:23:41,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:41,418 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:23:41,437 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/sorting_selectionsort_ground-1.i[823,836] [2022-01-31 07:23:41,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:41,479 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:23:41,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41 WrapperNode [2022-01-31 07:23:41,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:41,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:23:41,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:23:41,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:23:41,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:23:41,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:23:41,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:23:41,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:23:41,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:41,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:41,543 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 07:23:41,606 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 07:23:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:23:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:23:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:23:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:23:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:23:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:23:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:23:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:23:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:23:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:23:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:23:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:23:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:23:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:23:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:23:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:23:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:23:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:23:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:23:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:23:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:23:41,687 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:23:41,688 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:23:41,851 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:23:41,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:23:41,855 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-31 07:23:41,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:41 BoogieIcfgContainer [2022-01-31 07:23:41,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:23:41,857 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:23:41,857 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:23:41,866 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:23:41,868 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:41" (1/1) ... [2022-01-31 07:23:41,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:41 BasicIcfg [2022-01-31 07:23:41,901 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:23:41,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:23:41,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:23:41,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:23:41,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:23:41" (1/4) ... [2022-01-31 07:23:41,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a641f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:41, skipping insertion in model container [2022-01-31 07:23:41,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:41" (2/4) ... [2022-01-31 07:23:41,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a641f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:41, skipping insertion in model container [2022-01-31 07:23:41,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:41" (3/4) ... [2022-01-31 07:23:41,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a641f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:41, skipping insertion in model container [2022-01-31 07:23:41,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:41" (4/4) ... [2022-01-31 07:23:41,907 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.iJordan [2022-01-31 07:23:41,911 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:23:41,912 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:23:41,950 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:23:41,956 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 07:23:41,956 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:23:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:41,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash -855374569, now seen corresponding path program 1 times [2022-01-31 07:23:41,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812001020] [2022-01-31 07:23:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,141 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 07:23:42,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812001020] [2022-01-31 07:23:42,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812001020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:42,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:23:42,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313779965] [2022-01-31 07:23:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:42,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:42,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:42,172 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,203 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-01-31 07:23:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:23:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,210 INFO L225 Difference]: With dead ends: 45 [2022-01-31 07:23:42,210 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 07:23:42,212 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 07:23:42,214 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 07:23:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 07:23:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-01-31 07:23:42,243 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2022-01-31 07:23:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,243 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-01-31 07:23:42,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-01-31 07:23:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 07:23:42,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:23:42,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash 690922261, now seen corresponding path program 1 times [2022-01-31 07:23:42,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485083269] [2022-01-31 07:23:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,305 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 07:23:42,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485083269] [2022-01-31 07:23:42,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485083269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:42,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:42,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272775218] [2022-01-31 07:23:42,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:42,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:42,308 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,420 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-01-31 07:23:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:42,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 07:23:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,423 INFO L225 Difference]: With dead ends: 42 [2022-01-31 07:23:42,423 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 07:23:42,425 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 07:23:42,426 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 07:23:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 07:23:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-01-31 07:23:42,431 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2022-01-31 07:23:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,431 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-01-31 07:23:42,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:23:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-01-31 07:23:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 07:23:42,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:23:42,433 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1333887575, now seen corresponding path program 1 times [2022-01-31 07:23:42,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148470419] [2022-01-31 07:23:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,523 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 07:23:42,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148470419] [2022-01-31 07:23:42,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148470419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:42,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906512834] [2022-01-31 07:23:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:42,526 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 07:23:42,527 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 07:23:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:23:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:42,610 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 07:23:42,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:42,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906512834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:42,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:23:42,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673439749] [2022-01-31 07:23:42,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:42,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:42,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:42,613 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 07:23:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,634 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2022-01-31 07:23:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 18 [2022-01-31 07:23:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,635 INFO L225 Difference]: With dead ends: 59 [2022-01-31 07:23:42,635 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 07:23:42,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 07:23:42,636 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:42,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 07:23:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-01-31 07:23:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-31 07:23:42,648 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2022-01-31 07:23:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,648 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-31 07:23:42,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 07:23:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-31 07:23:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 07:23:42,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,649 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] [2022-01-31 07:23:42,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 07:23:42,867 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 07:23:42,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 874351277, now seen corresponding path program 1 times [2022-01-31 07:23:42,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87096250] [2022-01-31 07:23:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,928 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 07:23:42,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87096250] [2022-01-31 07:23:42,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87096250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489624186] [2022-01-31 07:23:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:42,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:42,944 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 07:23:42,945 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 07:23:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:43,016 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 07:23:43,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:43,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489624186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:43,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:43,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:23:43,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522971636] [2022-01-31 07:23:43,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:43,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:23:43,018 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 07:23:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,037 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-01-31 07:23:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:43,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2022-01-31 07:23:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,038 INFO L225 Difference]: With dead ends: 59 [2022-01-31 07:23:43,038 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 07:23:43,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 07:23:43,039 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 07:23:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2022-01-31 07:23:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-01-31 07:23:43,042 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2022-01-31 07:23:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,043 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-01-31 07:23:43,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 07:23:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-01-31 07:23:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 07:23:43,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,043 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] [2022-01-31 07:23:43,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 07:23:43,256 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 07:23:43,256 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1677805684, now seen corresponding path program 1 times [2022-01-31 07:23:43,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287779680] [2022-01-31 07:23:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,298 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 07:23:43,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287779680] [2022-01-31 07:23:43,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287779680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182039671] [2022-01-31 07:23:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:43,320 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 07:23:43,328 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 07:23:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:43,430 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 07:23:43,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:43,499 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 07:23:43,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182039671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:43,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:43,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:23:43,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982242145] [2022-01-31 07:23:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:43,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:23:43,501 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 07:23:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,620 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-01-31 07:23:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 20 [2022-01-31 07:23:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,621 INFO L225 Difference]: With dead ends: 52 [2022-01-31 07:23:43,621 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 07:23:43,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 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 07:23:43,622 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 63 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 07:23:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 07:23:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-01-31 07:23:43,626 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 20 [2022-01-31 07:23:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,626 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-01-31 07:23:43,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 07:23:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-01-31 07:23:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 07:23:43,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,627 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] [2022-01-31 07:23:43,657 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 07:23:43,843 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 07:23:43,843 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -270563118, now seen corresponding path program 2 times [2022-01-31 07:23:43,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043867829] [2022-01-31 07:23:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 07:23:43,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043867829] [2022-01-31 07:23:43,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043867829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:43,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:43,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:43,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944861550] [2022-01-31 07:23:43,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:43,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:43,908 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 07:23:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,003 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2022-01-31 07:23:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 26 [2022-01-31 07:23:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,005 INFO L225 Difference]: With dead ends: 77 [2022-01-31 07:23:44,005 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 07:23:44,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:44,007 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 43 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 07:23:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-01-31 07:23:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-01-31 07:23:44,022 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 26 [2022-01-31 07:23:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,022 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-01-31 07:23:44,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 07:23:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-01-31 07:23:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 07:23:44,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,025 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] [2022-01-31 07:23:44,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 07:23:44,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1771777191, now seen corresponding path program 1 times [2022-01-31 07:23:44,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18644646] [2022-01-31 07:23:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 07:23:44,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18644646] [2022-01-31 07:23:44,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18644646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:44,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:44,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 07:23:44,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539280772] [2022-01-31 07:23:44,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 07:23:44,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 07:23:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:44,103 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 07:23:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,188 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2022-01-31 07:23:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 07:23:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 29 [2022-01-31 07:23:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,192 INFO L225 Difference]: With dead ends: 73 [2022-01-31 07:23:44,193 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 07:23:44,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 07:23:44,193 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 74 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 48 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 07:23:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-01-31 07:23:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2022-01-31 07:23:44,205 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 29 [2022-01-31 07:23:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,205 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2022-01-31 07:23:44,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 07:23:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2022-01-31 07:23:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 07:23:44,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,206 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] [2022-01-31 07:23:44,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 07:23:44,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1884219428, now seen corresponding path program 1 times [2022-01-31 07:23:44,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702121067] [2022-01-31 07:23:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702121067] [2022-01-31 07:23:44,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702121067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:44,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427038982] [2022-01-31 07:23:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:44,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:44,287 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 07:23:44,325 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 07:23:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:23:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427038982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:44,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:44,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 07:23:44,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468183368] [2022-01-31 07:23:44,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 07:23:44,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 07:23:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:23:44,469 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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 07:23:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,626 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2022-01-31 07:23:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 07:23:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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 30 [2022-01-31 07:23:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,627 INFO L225 Difference]: With dead ends: 77 [2022-01-31 07:23:44,627 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 07:23:44,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 07:23:44,628 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 58 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 07:23:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 07:23:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:23:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-01-31 07:23:44,630 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 30 [2022-01-31 07:23:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,631 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-01-31 07:23:44,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 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 07:23:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-01-31 07:23:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 07:23:44,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,631 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 07:23:44,665 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 07:23:44,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:44,848 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1218121448, now seen corresponding path program 2 times [2022-01-31 07:23:44,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:44,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483179599] [2022-01-31 07:23:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:44,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:44,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483179599] [2022-01-31 07:23:44,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483179599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194787596] [2022-01-31 07:23:44,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:44,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:44,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:44,964 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 07:23:44,965 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 07:23:45,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 07:23:45,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 07:23:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:45,162 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-01-31 07:23:45,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2022-01-31 07:23:45,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 07:23:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-01-31 07:23:45,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:45,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194787596] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:45,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:45,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2022-01-31 07:23:45,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754695408] [2022-01-31 07:23:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:45,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:45,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:45,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 07:23:45,248 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 07:23:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:45,329 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-01-31 07:23:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 07:23:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 42 [2022-01-31 07:23:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:45,330 INFO L225 Difference]: With dead ends: 89 [2022-01-31 07:23:45,330 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 07:23:45,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-01-31 07:23:45,332 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:45,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 215 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 07:23:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2022-01-31 07:23:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 73 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2022-01-31 07:23:45,347 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 42 [2022-01-31 07:23:45,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:45,347 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2022-01-31 07:23:45,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 07:23:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2022-01-31 07:23:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 07:23:45,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:45,348 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:45,370 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 07:23:45,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,566 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1939903538, now seen corresponding path program 1 times [2022-01-31 07:23:45,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655170723] [2022-01-31 07:23:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 07:23:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:45,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:45,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655170723] [2022-01-31 07:23:45,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655170723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:45,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481037361] [2022-01-31 07:23:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:45,726 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 07:23:45,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 07:23:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:45,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:45,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481037361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:46,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:46,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 07:23:46,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135941010] [2022-01-31 07:23:46,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 07:23:46,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 07:23:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 07:23:46,139 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:46,505 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-01-31 07:23:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 07:23:46,505 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-01-31 07:23:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:46,508 INFO L225 Difference]: With dead ends: 106 [2022-01-31 07:23:46,508 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 07:23:46,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 07:23:46,509 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:46,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 07:23:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-31 07:23:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 97 states have internal predecessors, (113), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-01-31 07:23:46,513 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 50 [2022-01-31 07:23:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:46,513 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-01-31 07:23:46,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-01-31 07:23:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 07:23:46,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:46,514 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:46,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:46,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:46,727 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:46,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1002558490, now seen corresponding path program 2 times [2022-01-31 07:23:46,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939033723] [2022-01-31 07:23:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 07:23:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:47,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:47,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939033723] [2022-01-31 07:23:47,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939033723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:47,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789130306] [2022-01-31 07:23:47,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:47,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:47,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:47,019 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) [2022-01-31 07:23:47,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 07:23:47,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:23:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:23:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 07:23:47,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789130306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:47,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:47,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 07:23:47,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054375129] [2022-01-31 07:23:47,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:47,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 07:23:47,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 07:23:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:23:47,854 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:48,796 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2022-01-31 07:23:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 07:23:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2022-01-31 07:23:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:48,798 INFO L225 Difference]: With dead ends: 154 [2022-01-31 07:23:48,798 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 07:23:48,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 07:23:48,800 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:48,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 53 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 07:23:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-01-31 07:23:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 145 states have internal predecessors, (161), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:23:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-01-31 07:23:48,804 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 74 [2022-01-31 07:23:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:48,804 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-01-31 07:23:48,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 49 states have internal predecessors, (119), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-01-31 07:23:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 07:23:48,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:48,805 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:48,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:49,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:49,024 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1286165526, now seen corresponding path program 3 times [2022-01-31 07:23:49,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:49,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531500707] [2022-01-31 07:23:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:49,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 07:23:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 07:23:50,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531500707] [2022-01-31 07:23:50,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531500707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427402457] [2022-01-31 07:23:50,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:23:50,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:50,121 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) [2022-01-31 07:23:50,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 07:23:50,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 07:23:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 07:23:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2022-01-31 07:23:50,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-01-31 07:23:50,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427402457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:50,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:50,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2022-01-31 07:23:50,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893454844] [2022-01-31 07:23:50,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:50,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 07:23:50,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 07:23:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 07:23:50,687 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:52,225 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2022-01-31 07:23:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 07:23:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 122 [2022-01-31 07:23:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:52,227 INFO L225 Difference]: With dead ends: 207 [2022-01-31 07:23:52,227 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 07:23:52,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3820, Invalid=8612, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 07:23:52,231 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 300 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:52,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 83 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:23:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 07:23:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 185. [2022-01-31 07:23:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 174 states have (on average 1.1379310344827587) internal successors, (198), 175 states have internal predecessors, (198), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 211 transitions. [2022-01-31 07:23:52,236 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 211 transitions. Word has length 122 [2022-01-31 07:23:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:52,237 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 211 transitions. [2022-01-31 07:23:52,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.392857142857143) internal successors, (134), 55 states have internal predecessors, (134), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 211 transitions. [2022-01-31 07:23:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 07:23:52,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:52,238 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:52,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:52,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 07:23:52,439 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1945409376, now seen corresponding path program 4 times [2022-01-31 07:23:52,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:52,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099376278] [2022-01-31 07:23:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:52,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:53,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:53,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 07:23:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:23:53,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099376278] [2022-01-31 07:23:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099376278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54297510] [2022-01-31 07:23:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:23:53,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:53,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:53,353 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) [2022-01-31 07:23:53,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 07:23:53,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:23:53,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:53,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 07:23:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 07:23:53,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:23:55,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54297510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:55,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:55,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-01-31 07:23:55,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774098640] [2022-01-31 07:23:55,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:55,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 07:23:55,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:55,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 07:23:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 07:23:55,876 INFO L87 Difference]: Start difference. First operand 185 states and 211 transitions. Second operand has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:58,143 INFO L93 Difference]: Finished difference Result 283 states and 309 transitions. [2022-01-31 07:23:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 07:23:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-01-31 07:23:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:58,146 INFO L225 Difference]: With dead ends: 283 [2022-01-31 07:23:58,146 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 07:23:58,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 07:23:58,152 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 279 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:58,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 83 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 07:23:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-01-31 07:23:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 272 states have (on average 1.088235294117647) internal successors, (296), 273 states have internal predecessors, (296), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 07:23:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 309 transitions. [2022-01-31 07:23:58,173 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 309 transitions. Word has length 133 [2022-01-31 07:23:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:58,173 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 309 transitions. [2022-01-31 07:23:58,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.19) internal successors, (219), 99 states have internal predecessors, (219), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:23:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 309 transitions. [2022-01-31 07:23:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 07:23:58,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:58,184 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:58,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:58,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 07:23:58,401 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1405990338, now seen corresponding path program 5 times [2022-01-31 07:23:58,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:58,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155423797] [2022-01-31 07:23:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:58,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:00,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-01-31 07:24:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:24:00,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:00,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155423797] [2022-01-31 07:24:00,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155423797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:00,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141725089] [2022-01-31 07:24:00,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:24:00,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:00,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:00,671 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) [2022-01-31 07:24:00,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process