/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/duplets.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 03:07:16,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:07:16,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:07:16,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 03:07:16,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 03:07:16,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 03:07:16,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 03:07:16,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 03:07:16,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 03:07:16,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 03:07:16,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 03:07:16,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 03:07:16,549 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 03:07:16,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 03:07:16,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 03:07:16,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 03:07:16,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 03:07:16,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 03:07:16,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 03:07:16,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 03:07:16,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 03:07:16,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 03:07:16,582 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:07:16,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:07:16,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:07:16,585 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:07:16,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:07:16,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:07:16,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:07:16,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:07:16,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:07:16,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:07:16,587 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:07:16,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:07:16,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:07:16,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:07:16,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:07:16,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:07:16,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:07:16,589 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:07:16,589 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:07:16,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:07:16,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:07:16,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:07:16,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:07:16,875 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:07:16,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/duplets.c [2022-03-19 03:07:16,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cec69e15/50ac7c08d540493fbe4b413cd8f97cfc/FLAGdd356a1bb [2022-03-19 03:07:17,378 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:07:17,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c [2022-03-19 03:07:17,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cec69e15/50ac7c08d540493fbe4b413cd8f97cfc/FLAGdd356a1bb [2022-03-19 03:07:17,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cec69e15/50ac7c08d540493fbe4b413cd8f97cfc [2022-03-19 03:07:17,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:07:17,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:07:17,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:07:17,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:07:17,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:07:17,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:07:17" (1/1) ... [2022-03-19 03:07:17,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86dbf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:17, skipping insertion in model container [2022-03-19 03:07:17,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:07:17" (1/1) ... [2022-03-19 03:07:17,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:07:17,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:07:17,959 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-03-19 03:07:18,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:07:18,019 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:07:18,030 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-03-19 03:07:18,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:07:18,068 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:07:18,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18 WrapperNode [2022-03-19 03:07:18,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:07:18,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:07:18,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:07:18,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:07:18,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:07:18,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:07:18,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:07:18,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:07:18,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (1/1) ... [2022-03-19 03:07:18,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:07:18,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:18,156 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) [2022-03-19 03:07:18,182 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 [2022-03-19 03:07:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:07:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:07:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:07:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:07:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 03:07:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure mkdup [2022-03-19 03:07:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure finddup [2022-03-19 03:07:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:07:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-19 03:07:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-19 03:07:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-19 03:07:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure mkdup [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure finddup [2022-03-19 03:07:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:07:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:07:18,319 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:07:18,321 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:07:18,578 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:07:18,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:07:18,586 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 03:07:18,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:07:18 BoogieIcfgContainer [2022-03-19 03:07:18,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:07:18,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:07:18,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:07:18,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:07:18,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:07:17" (1/3) ... [2022-03-19 03:07:18,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f647d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:07:18, skipping insertion in model container [2022-03-19 03:07:18,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:07:18" (2/3) ... [2022-03-19 03:07:18,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f647d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:07:18, skipping insertion in model container [2022-03-19 03:07:18,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:07:18" (3/3) ... [2022-03-19 03:07:18,598 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-03-19 03:07:18,603 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:07:18,603 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:07:18,649 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:07:18,657 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 03:07:18,657 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:07:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 03:07:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 03:07:18,693 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:18,694 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:18,694 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:18,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:18,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1531213237, now seen corresponding path program 1 times [2022-03-19 03:07:18,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:18,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272803044] [2022-03-19 03:07:18,714 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:18,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1531213237, now seen corresponding path program 2 times [2022-03-19 03:07:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:18,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571471671] [2022-03-19 03:07:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:18,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:18,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:18,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:18,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:19,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:19,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571471671] [2022-03-19 03:07:19,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571471671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:19,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:19,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 03:07:19,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [272803044] [2022-03-19 03:07:19,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [272803044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:19,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:19,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 03:07:19,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061783859] [2022-03-19 03:07:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:19,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 03:07:19,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 03:07:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 03:07:19,102 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 03:07:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:19,348 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-03-19 03:07:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:07:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-19 03:07:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:19,365 INFO L225 Difference]: With dead ends: 113 [2022-03-19 03:07:19,366 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 03:07:19,370 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:07:19,375 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:19,376 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:07:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 03:07:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-03-19 03:07:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:07:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-19 03:07:19,422 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 49 [2022-03-19 03:07:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:19,423 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-19 03:07:19,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 03:07:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-19 03:07:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 03:07:19,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:19,428 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:19,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:07:19,431 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1121655349, now seen corresponding path program 1 times [2022-03-19 03:07:19,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:19,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1844743936] [2022-03-19 03:07:19,434 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:19,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1121655349, now seen corresponding path program 2 times [2022-03-19 03:07:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:19,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171734441] [2022-03-19 03:07:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:19,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:07:19,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:19,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171734441] [2022-03-19 03:07:19,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171734441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:19,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394122897] [2022-03-19 03:07:19,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:19,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:19,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:19,681 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) [2022-03-19 03:07:19,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 03:07:19,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:19,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 03:07:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:07:20,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:07:20,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394122897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:07:20,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:07:20,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 17 [2022-03-19 03:07:20,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:20,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1844743936] [2022-03-19 03:07:20,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1844743936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:20,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:20,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 03:07:20,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699978356] [2022-03-19 03:07:20,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:20,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 03:07:20,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 03:07:20,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 03:07:20,528 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 03:07:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:21,009 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-03-19 03:07:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 03:07:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2022-03-19 03:07:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:21,015 INFO L225 Difference]: With dead ends: 84 [2022-03-19 03:07:21,015 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 03:07:21,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-03-19 03:07:21,022 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 95 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:21,022 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 58 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:07:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 03:07:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-03-19 03:07:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:07:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-03-19 03:07:21,036 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 49 [2022-03-19 03:07:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:21,037 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-03-19 03:07:21,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 03:07:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-03-19 03:07:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 03:07:21,038 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:21,038 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:21,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 03:07:21,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:21,262 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2096379008, now seen corresponding path program 1 times [2022-03-19 03:07:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210035419] [2022-03-19 03:07:21,263 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2096379008, now seen corresponding path program 2 times [2022-03-19 03:07:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816248084] [2022-03-19 03:07:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:21,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:21,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816248084] [2022-03-19 03:07:21,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816248084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:21,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:21,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:07:21,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210035419] [2022-03-19 03:07:21,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210035419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:21,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:21,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:07:21,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946773182] [2022-03-19 03:07:21,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:21,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:07:21,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:21,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:07:21,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:07:21,424 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 03:07:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:21,766 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-03-19 03:07:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:07:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 50 [2022-03-19 03:07:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:21,768 INFO L225 Difference]: With dead ends: 75 [2022-03-19 03:07:21,768 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 03:07:21,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:07:21,769 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 79 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:21,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 65 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:07:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 03:07:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-03-19 03:07:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 03:07:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-03-19 03:07:21,783 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 50 [2022-03-19 03:07:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:21,783 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-03-19 03:07:21,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 03:07:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-03-19 03:07:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 03:07:21,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:21,785 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:21,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 03:07:21,785 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash 983031743, now seen corresponding path program 1 times [2022-03-19 03:07:21,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:21,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [91196497] [2022-03-19 03:07:21,786 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 983031743, now seen corresponding path program 2 times [2022-03-19 03:07:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:21,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236260146] [2022-03-19 03:07:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:21,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:21,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:22,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:22,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:07:22,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236260146] [2022-03-19 03:07:22,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236260146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288980912] [2022-03-19 03:07:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:22,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:22,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:22,224 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) [2022-03-19 03:07:22,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 03:07:22,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:22,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:22,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 03:07:22,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:07:22,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:07:23,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288980912] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:23,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:07:23,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 12] total 25 [2022-03-19 03:07:23,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:23,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [91196497] [2022-03-19 03:07:23,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [91196497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:23,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:23,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 03:07:23,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082736139] [2022-03-19 03:07:23,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:23,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 03:07:23,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 03:07:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-19 03:07:23,259 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 03:07:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:23,420 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2022-03-19 03:07:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:07:23,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2022-03-19 03:07:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:23,423 INFO L225 Difference]: With dead ends: 104 [2022-03-19 03:07:23,423 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 03:07:23,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-03-19 03:07:23,424 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 44 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:23,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 410 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:07:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 03:07:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-03-19 03:07:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 03:07:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-19 03:07:23,437 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 52 [2022-03-19 03:07:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:23,437 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-19 03:07:23,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 03:07:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-19 03:07:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 03:07:23,439 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:23,439 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:23,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:23,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 03:07:23,663 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2045094069, now seen corresponding path program 1 times [2022-03-19 03:07:23,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:23,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1509127345] [2022-03-19 03:07:23,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2045094069, now seen corresponding path program 2 times [2022-03-19 03:07:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:23,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432721688] [2022-03-19 03:07:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:23,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:23,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432721688] [2022-03-19 03:07:23,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432721688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236007424] [2022-03-19 03:07:23,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:23,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:23,783 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) [2022-03-19 03:07:23,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 03:07:23,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:23,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:23,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 03:07:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:23,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:24,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236007424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:07:24,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:07:24,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2022-03-19 03:07:24,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:24,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1509127345] [2022-03-19 03:07:24,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1509127345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:24,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:24,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 03:07:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803951495] [2022-03-19 03:07:24,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:24,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 03:07:24,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 03:07:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-19 03:07:24,059 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 03:07:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:24,269 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-03-19 03:07:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 03:07:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 55 [2022-03-19 03:07:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:24,271 INFO L225 Difference]: With dead ends: 88 [2022-03-19 03:07:24,271 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 03:07:24,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:07:24,272 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:24,272 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:07:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 03:07:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-19 03:07:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 03:07:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-19 03:07:24,283 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2022-03-19 03:07:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:24,284 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-19 03:07:24,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 03:07:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-19 03:07:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 03:07:24,285 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:24,285 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:24,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:24,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:24,510 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash 629236887, now seen corresponding path program 1 times [2022-03-19 03:07:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910201382] [2022-03-19 03:07:24,511 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash 629236887, now seen corresponding path program 2 times [2022-03-19 03:07:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527277904] [2022-03-19 03:07:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:24,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:07:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:24,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:24,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527277904] [2022-03-19 03:07:24,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527277904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:24,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618364866] [2022-03-19 03:07:24,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:24,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:24,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:24,849 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) [2022-03-19 03:07:24,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 03:07:24,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:24,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:24,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 03:07:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:25,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-03-19 03:07:25,116 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-03-19 03:07:25,130 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-03-19 03:07:25,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-03-19 03:07:25,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-03-19 03:07:25,234 INFO L390 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 [2022-03-19 03:07:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:25,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:07:25,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618364866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:25,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:07:25,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 24 [2022-03-19 03:07:25,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:25,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910201382] [2022-03-19 03:07:25,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910201382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:25,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:25,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:07:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076839760] [2022-03-19 03:07:25,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:25,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:07:25,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:07:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:07:25,283 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:07:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:25,519 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-19 03:07:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:07:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-03-19 03:07:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:25,521 INFO L225 Difference]: With dead ends: 85 [2022-03-19 03:07:25,521 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 03:07:25,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-19 03:07:25,522 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 45 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:25,522 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 446 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:07:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 03:07:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-03-19 03:07:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 03:07:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-03-19 03:07:25,535 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 57 [2022-03-19 03:07:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:25,536 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-03-19 03:07:25,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:07:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-03-19 03:07:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 03:07:25,537 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:25,537 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:25,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:25,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:25,762 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash 631083929, now seen corresponding path program 1 times [2022-03-19 03:07:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:25,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665994920] [2022-03-19 03:07:25,763 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 631083929, now seen corresponding path program 2 times [2022-03-19 03:07:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633171918] [2022-03-19 03:07:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:07:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633171918] [2022-03-19 03:07:25,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633171918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:25,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:25,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:25,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665994920] [2022-03-19 03:07:25,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665994920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:25,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:25,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:07:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120216780] [2022-03-19 03:07:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:25,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:07:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:07:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:07:25,972 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:07:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:26,448 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2022-03-19 03:07:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:07:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-03-19 03:07:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:26,450 INFO L225 Difference]: With dead ends: 106 [2022-03-19 03:07:26,450 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 03:07:26,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-19 03:07:26,451 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:26,451 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 58 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:07:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 03:07:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-03-19 03:07:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 57 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-19 03:07:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-03-19 03:07:26,466 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 57 [2022-03-19 03:07:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:26,466 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-03-19 03:07:26,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:07:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-03-19 03:07:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 03:07:26,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:26,467 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:26,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 03:07:26,468 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1636680555, now seen corresponding path program 3 times [2022-03-19 03:07:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:26,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1394454874] [2022-03-19 03:07:26,469 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1636680555, now seen corresponding path program 4 times [2022-03-19 03:07:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:26,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626399819] [2022-03-19 03:07:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:26,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:26,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:26,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:26,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 03:07:27,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626399819] [2022-03-19 03:07:27,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626399819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584834266] [2022-03-19 03:07:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:07:27,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:27,304 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) [2022-03-19 03:07:27,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 03:07:27,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:07:27,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:27,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 03:07:27,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:27,622 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-19 03:07:27,623 INFO L390 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 23 [2022-03-19 03:07:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 03:07:36,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:36,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584834266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:36,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:07:36,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-03-19 03:07:36,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:36,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1394454874] [2022-03-19 03:07:36,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1394454874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:36,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:36,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 03:07:36,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54479410] [2022-03-19 03:07:36,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:36,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 03:07:36,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 03:07:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1025, Unknown=5, NotChecked=0, Total=1122 [2022-03-19 03:07:36,892 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 03:07:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:46,357 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2022-03-19 03:07:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 03:07:46,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-19 03:07:46,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:46,359 INFO L225 Difference]: With dead ends: 149 [2022-03-19 03:07:46,359 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 03:07:46,360 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=291, Invalid=2783, Unknown=6, NotChecked=0, Total=3080 [2022-03-19 03:07:46,361 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 144 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:46,361 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 68 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 03:07:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 03:07:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2022-03-19 03:07:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 states have internal predecessors, (69), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-19 03:07:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2022-03-19 03:07:46,386 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 58 [2022-03-19 03:07:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:46,387 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2022-03-19 03:07:46,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 8 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 03:07:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2022-03-19 03:07:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 03:07:46,388 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:46,388 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:46,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:46,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:46,612 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash 596047115, now seen corresponding path program 5 times [2022-03-19 03:07:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:46,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1534676892] [2022-03-19 03:07:46,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash 596047115, now seen corresponding path program 6 times [2022-03-19 03:07:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:46,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620651058] [2022-03-19 03:07:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:46,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620651058] [2022-03-19 03:07:46,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620651058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977143401] [2022-03-19 03:07:46,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:07:46,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:46,745 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) [2022-03-19 03:07:46,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 03:07:46,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 03:07:46,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 03:07:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:46,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:07:47,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977143401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:07:47,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:07:47,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 10 [2022-03-19 03:07:47,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:47,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1534676892] [2022-03-19 03:07:47,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1534676892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:47,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:47,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:07:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047204538] [2022-03-19 03:07:47,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:47,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:07:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:47,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:07:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 03:07:47,081 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 03:07:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:47,393 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2022-03-19 03:07:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:07:47,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 61 [2022-03-19 03:07:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:47,395 INFO L225 Difference]: With dead ends: 140 [2022-03-19 03:07:47,395 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 03:07:47,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-03-19 03:07:47,397 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:47,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 57 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:07:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 03:07:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-19 03:07:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-19 03:07:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-03-19 03:07:47,417 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 61 [2022-03-19 03:07:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:47,417 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-03-19 03:07:47,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 03:07:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-03-19 03:07:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 03:07:47,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:47,420 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:47,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:47,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:47,635 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 645513954, now seen corresponding path program 1 times [2022-03-19 03:07:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504500858] [2022-03-19 03:07:47,636 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 645513954, now seen corresponding path program 2 times [2022-03-19 03:07:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689238473] [2022-03-19 03:07:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:47,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:07:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 03:07:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 03:07:47,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689238473] [2022-03-19 03:07:47,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689238473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:47,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:47,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:07:47,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504500858] [2022-03-19 03:07:47,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504500858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:47,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:47,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:07:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455366254] [2022-03-19 03:07:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:47,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:07:47,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:07:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:07:47,758 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 03:07:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:48,063 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-03-19 03:07:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:07:48,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-03-19 03:07:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:48,064 INFO L225 Difference]: With dead ends: 111 [2022-03-19 03:07:48,064 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 03:07:48,065 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:07:48,065 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:48,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 49 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:07:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 03:07:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-03-19 03:07:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2022-03-19 03:07:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-03-19 03:07:48,108 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 64 [2022-03-19 03:07:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:48,109 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-03-19 03:07:48,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 03:07:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-03-19 03:07:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 03:07:48,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:48,113 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:48,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 03:07:48,114 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash 643666912, now seen corresponding path program 1 times [2022-03-19 03:07:48,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:48,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617167742] [2022-03-19 03:07:48,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:48,115 INFO L85 PathProgramCache]: Analyzing trace with hash 643666912, now seen corresponding path program 2 times [2022-03-19 03:07:48,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:48,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387836696] [2022-03-19 03:07:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:48,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:07:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 03:07:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 03:07:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387836696] [2022-03-19 03:07:48,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387836696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:48,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:48,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:07:48,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617167742] [2022-03-19 03:07:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617167742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:48,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:07:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409170997] [2022-03-19 03:07:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:48,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:07:48,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:07:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:07:48,251 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 03:07:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:48,661 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2022-03-19 03:07:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:07:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-03-19 03:07:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:48,662 INFO L225 Difference]: With dead ends: 106 [2022-03-19 03:07:48,662 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 03:07:48,663 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:07:48,664 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:48,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 56 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:07:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 03:07:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-03-19 03:07:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-03-19 03:07:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2022-03-19 03:07:48,684 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 64 [2022-03-19 03:07:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:48,684 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2022-03-19 03:07:48,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 03:07:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2022-03-19 03:07:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 03:07:48,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:48,685 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:48,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 03:07:48,685 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash -779883059, now seen corresponding path program 1 times [2022-03-19 03:07:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1741067732] [2022-03-19 03:07:48,686 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash -779883059, now seen corresponding path program 2 times [2022-03-19 03:07:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:48,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45466826] [2022-03-19 03:07:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:48,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 03:07:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 03:07:48,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45466826] [2022-03-19 03:07:48,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45466826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:48,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:48,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:07:48,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1741067732] [2022-03-19 03:07:48,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1741067732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:48,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:48,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:07:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274525959] [2022-03-19 03:07:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:48,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:07:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:07:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-03-19 03:07:48,887 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:07:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:49,454 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2022-03-19 03:07:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:07:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-19 03:07:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:49,456 INFO L225 Difference]: With dead ends: 126 [2022-03-19 03:07:49,456 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 03:07:49,456 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-19 03:07:49,457 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 82 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:49,457 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:07:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 03:07:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2022-03-19 03:07:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 64 states have internal predecessors, (72), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 03:07:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-03-19 03:07:49,502 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 66 [2022-03-19 03:07:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:49,502 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-03-19 03:07:49,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:07:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-03-19 03:07:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 03:07:49,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:49,503 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:49,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 03:07:49,504 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:49,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:49,504 INFO L85 PathProgramCache]: Analyzing trace with hash 297933182, now seen corresponding path program 1 times [2022-03-19 03:07:49,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:49,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684831842] [2022-03-19 03:07:49,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:49,504 INFO L85 PathProgramCache]: Analyzing trace with hash 297933182, now seen corresponding path program 2 times [2022-03-19 03:07:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:49,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803692059] [2022-03-19 03:07:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:07:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 03:07:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 03:07:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 03:07:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803692059] [2022-03-19 03:07:49,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803692059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425766961] [2022-03-19 03:07:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:49,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:49,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:49,770 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) [2022-03-19 03:07:49,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 03:07:49,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 03:07:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:49,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-03-19 03:07:49,994 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-03-19 03:07:49,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-03-19 03:07:50,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 28 treesize of output 31 [2022-03-19 03:07:50,029 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-03-19 03:07:50,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-03-19 03:07:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:07:50,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2022-03-19 03:07:50,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-03-19 03:07:50,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 41 treesize of output 40 [2022-03-19 03:07:50,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-19 03:07:50,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-03-19 03:07:50,518 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 03:07:50,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-19 03:07:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 03:07:50,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:07:50,717 INFO L356 Elim1Store]: treesize reduction 28, result has 33.3 percent of original size [2022-03-19 03:07:50,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 52 [2022-03-19 03:07:50,722 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:50,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-03-19 03:07:50,727 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:50,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 63 [2022-03-19 03:07:50,741 INFO L390 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 83 treesize of output 75 [2022-03-19 03:07:50,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 81 treesize of output 75 [2022-03-19 03:07:50,754 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 03:07:50,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 03:07:50,817 INFO L356 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-03-19 03:07:50,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-03-19 03:07:50,842 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:50,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 215 [2022-03-19 03:07:50,862 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:50,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 216 [2022-03-19 03:07:50,908 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:50,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 6 [2022-03-19 03:07:50,923 INFO L356 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-03-19 03:07:50,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 1 [2022-03-19 03:07:50,975 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:50,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 15 [2022-03-19 03:07:51,010 INFO L356 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-03-19 03:07:51,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 1 [2022-03-19 03:07:51,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 03:07:51,259 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-19 03:07:51,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 03:07:51,280 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-19 03:07:51,323 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-03-19 03:07:51,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2022-03-19 03:07:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 03:07:51,427 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-19 03:07:51,453 INFO L356 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-03-19 03:07:51,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 1 [2022-03-19 03:07:51,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-19 03:07:51,556 INFO L356 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-03-19 03:07:51,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 1 [2022-03-19 03:07:51,586 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-03-19 03:07:51,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-03-19 03:07:51,807 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:51,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 15 [2022-03-19 03:07:51,827 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:51,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 11 [2022-03-19 03:07:52,020 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:52,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-19 03:07:52,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2022-03-19 03:07:52,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2022-03-19 03:07:52,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2022-03-19 03:07:52,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,206 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:52,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-03-19 03:07:52,265 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:07:52,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2022-03-19 03:07:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:07:52,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:07:52,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-19 03:07:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:07:52,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 11 [2022-03-19 03:07:52,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2022-03-19 03:07:52,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:07:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 03:07:52,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425766961] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:52,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:07:52,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16, 11] total 27 [2022-03-19 03:07:52,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:07:52,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684831842] [2022-03-19 03:07:52,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684831842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:07:52,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:07:52,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:07:52,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380240794] [2022-03-19 03:07:52,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:07:52,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:07:52,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:07:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-19 03:07:52,672 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 03:07:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:07:52,861 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-03-19 03:07:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:07:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-03-19 03:07:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:07:52,862 INFO L225 Difference]: With dead ends: 110 [2022-03-19 03:07:52,862 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 03:07:52,863 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-19 03:07:52,863 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:07:52,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 465 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:07:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 03:07:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-19 03:07:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 75 states have internal predecessors, (82), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-19 03:07:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-03-19 03:07:52,886 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 70 [2022-03-19 03:07:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:07:52,887 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-03-19 03:07:52,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 03:07:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-03-19 03:07:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 03:07:52,888 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:07:52,888 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:07:52,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 03:07:53,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:53,108 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:07:53,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:07:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1867983073, now seen corresponding path program 7 times [2022-03-19 03:07:53,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:07:53,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543522289] [2022-03-19 03:07:53,109 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:07:53,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1867983073, now seen corresponding path program 8 times [2022-03-19 03:07:53,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:07:53,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821131034] [2022-03-19 03:07:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:07:53,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:07:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:53,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:07:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:53,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:53,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:07:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:53,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:07:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:54,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:07:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:07:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:54,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:07:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:54,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:07:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:07:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 03:07:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:07:56,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821131034] [2022-03-19 03:07:56,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821131034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:07:56,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121171877] [2022-03-19 03:07:56,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:07:56,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:07:56,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:07:56,796 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) [2022-03-19 03:07:56,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 03:07:56,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:07:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:07:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 03:07:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:07:56,939 INFO L390 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 0 case distinctions, treesize of input 7 treesize of output 6 [2022-03-19 03:08:11,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 29 treesize of output 24 [2022-03-19 03:08:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:08:13,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:08:41,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121171877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:08:41,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:08:41,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 48 [2022-03-19 03:08:41,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:08:41,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543522289] [2022-03-19 03:08:41,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543522289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:08:41,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:08:41,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 03:08:41,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063542929] [2022-03-19 03:08:41,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:08:41,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 03:08:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:08:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 03:08:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3639, Unknown=28, NotChecked=0, Total=4032 [2022-03-19 03:08:41,151 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 27 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 03:08:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:08:47,079 INFO L93 Difference]: Finished difference Result 199 states and 239 transitions. [2022-03-19 03:08:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 03:08:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2022-03-19 03:08:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:08:47,081 INFO L225 Difference]: With dead ends: 199 [2022-03-19 03:08:47,081 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 03:08:47,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=690, Invalid=7837, Unknown=29, NotChecked=0, Total=8556 [2022-03-19 03:08:47,084 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 199 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:08:47,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 67 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 03:08:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 03:08:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2022-03-19 03:08:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 84 states have internal predecessors, (94), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-19 03:08:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2022-03-19 03:08:47,113 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 67 [2022-03-19 03:08:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:08:47,113 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2022-03-19 03:08:47,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.68) internal successors, (42), 23 states have internal predecessors, (42), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 03:08:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2022-03-19 03:08:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 03:08:47,114 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:08:47,114 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:08:47,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 03:08:47,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 03:08:47,333 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:08:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:08:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1243098892, now seen corresponding path program 1 times [2022-03-19 03:08:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:08:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519304309] [2022-03-19 03:08:47,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:08:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1243098892, now seen corresponding path program 2 times [2022-03-19 03:08:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:08:47,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955389984] [2022-03-19 03:08:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:08:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:08:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:08:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:08:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:08:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:08:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:08:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:08:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:08:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:08:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 03:08:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 03:08:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 03:08:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 03:08:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:08:47,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955389984] [2022-03-19 03:08:47,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955389984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:08:47,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997208159] [2022-03-19 03:08:47,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:08:47,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:08:47,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:08:47,634 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) [2022-03-19 03:08:47,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 03:08:47,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:08:47,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:08:47,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 03:08:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:08:47,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-03-19 03:08:47,965 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-03-19 03:08:47,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-03-19 03:08:48,328 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 03:08:48,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-19 03:08:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 03:08:48,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:08:48,562 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-03-19 03:08:48,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 670 treesize of output 606 [2022-03-19 03:08:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 03:08:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997208159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:08:49,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:08:49,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 31 [2022-03-19 03:08:49,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:08:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519304309] [2022-03-19 03:08:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519304309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:08:49,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:08:49,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 03:08:49,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846038480] [2022-03-19 03:08:49,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:08:49,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 03:08:49,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:08:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 03:08:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-19 03:08:49,157 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 03:08:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:08:49,815 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2022-03-19 03:08:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 03:08:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-03-19 03:08:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:08:49,816 INFO L225 Difference]: With dead ends: 135 [2022-03-19 03:08:49,817 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 03:08:49,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 148 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 03:08:49,818 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 102 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:08:49,818 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 68 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:08:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 03:08:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2022-03-19 03:08:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 93 states have internal predecessors, (103), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-19 03:08:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2022-03-19 03:08:49,847 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 73 [2022-03-19 03:08:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:08:49,848 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2022-03-19 03:08:49,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 03:08:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2022-03-19 03:08:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 03:08:49,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:08:49,849 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:08:49,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 03:08:50,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 03:08:50,059 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:08:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:08:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash 680409498, now seen corresponding path program 1 times [2022-03-19 03:08:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:08:50,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1063819153] [2022-03-19 03:08:50,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:08:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash 680409498, now seen corresponding path program 2 times [2022-03-19 03:08:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:08:50,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32048945] [2022-03-19 03:08:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:08:50,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:08:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:08:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:08:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 03:08:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 03:08:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 03:08:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:08:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:08:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 03:08:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 03:08:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 03:08:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 03:08:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 03:08:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:08:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 03:08:50,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:08:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32048945] [2022-03-19 03:08:50,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32048945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:08:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526591391] [2022-03-19 03:08:50,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:08:50,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:08:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:08:50,548 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) [2022-03-19 03:08:50,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 03:08:50,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:08:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:08:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 03:08:50,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:08:50,724 INFO L356 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-03-19 03:08:50,724 INFO L390 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 [2022-03-19 03:08:50,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-03-19 03:08:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:08:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:08:51,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:08:51,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2022-03-19 03:08:52,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:08:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 03:08:52,096 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-03-19 03:08:52,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-03-19 03:08:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 03:08:52,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:08:52,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 03:08:52,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-03-19 03:08:57,030 INFO L390 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 85436 treesize of output 84680 [2022-03-19 03:09:00,598 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-19 03:09:00,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76752 treesize of output 75408 [2022-03-19 03:09:01,079 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-19 03:09:01,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 03:09:01,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 03:09:01,303 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:364) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:203) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-19 03:09:01,306 INFO L158 Benchmark]: Toolchain (without parser) took 103536.78ms. Allocated memory was 183.5MB in the beginning and 505.4MB in the end (delta: 321.9MB). Free memory was 134.6MB in the beginning and 392.0MB in the end (delta: -257.4MB). Peak memory consumption was 284.7MB. Max. memory is 8.0GB. [2022-03-19 03:09:01,306 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 183.5MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 03:09:01,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.12ms. Allocated memory is still 183.5MB. Free memory was 134.5MB in the beginning and 158.3MB in the end (delta: -23.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 03:09:01,306 INFO L158 Benchmark]: Boogie Preprocessor took 50.09ms. Allocated memory is still 183.5MB. Free memory was 158.3MB in the beginning and 156.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 03:09:01,306 INFO L158 Benchmark]: RCFGBuilder took 466.18ms. Allocated memory is still 183.5MB. Free memory was 156.7MB in the beginning and 142.5MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-03-19 03:09:01,307 INFO L158 Benchmark]: TraceAbstraction took 102714.53ms. Allocated memory was 183.5MB in the beginning and 505.4MB in the end (delta: 321.9MB). Free memory was 142.1MB in the beginning and 392.0MB in the end (delta: -249.9MB). Peak memory consumption was 293.7MB. Max. memory is 8.0GB. [2022-03-19 03:09:01,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 183.5MB. Free memory is still 150.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 298.12ms. Allocated memory is still 183.5MB. Free memory was 134.5MB in the beginning and 158.3MB in the end (delta: -23.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.09ms. Allocated memory is still 183.5MB. Free memory was 158.3MB in the beginning and 156.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 466.18ms. Allocated memory is still 183.5MB. Free memory was 156.7MB in the beginning and 142.5MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 102714.53ms. Allocated memory was 183.5MB in the beginning and 505.4MB in the end (delta: 321.9MB). Free memory was 142.1MB in the beginning and 392.0MB in the end (delta: -249.9MB). Peak memory consumption was 293.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-19 03:09:01,516 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-19 03:09:01,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...