/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 01:04:24,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:04:24,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:04:24,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 01:04:24,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 01:04:24,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 01:04:24,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 01:04:24,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 01:04:24,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 01:04:24,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 01:04:24,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 01:04:24,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 01:04:24,982 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 01:04:24,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 01:04:24,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 01:04:24,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 01:04:24,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 01:04:24,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 01:04:24,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:04:24,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:04:24,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:04:24,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 01:04:25,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:04:25,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:04:25,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:04:25,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:04:25,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:04:25,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:04:25,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:04:25,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:04:25,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:04:25,009 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:04:25,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:04:25,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:04:25,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:04:25,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:04:25,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:04:25,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:04:25,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:04:25,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:04:25,010 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:04:25,010 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:04:25,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:04:25,010 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:04:25,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:04:25,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:04:25,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:04:25,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:04:25,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:04:25,238 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:04:25,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-03-18 01:04:25,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0337f9f78/1f1c102334604e73849e0934cc9302ea/FLAG64d786e70 [2022-03-18 01:04:25,670 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:04:25,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-03-18 01:04:25,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0337f9f78/1f1c102334604e73849e0934cc9302ea/FLAG64d786e70 [2022-03-18 01:04:25,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0337f9f78/1f1c102334604e73849e0934cc9302ea [2022-03-18 01:04:25,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:04:25,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:04:25,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:04:25,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:04:25,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:04:25,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a680be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25, skipping insertion in model container [2022-03-18 01:04:25,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:04:25,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:04:25,864 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/prefixsum_iter.c[526,539] [2022-03-18 01:04:25,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:04:25,915 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:04:25,926 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/prefixsum_iter.c[526,539] [2022-03-18 01:04:25,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:04:25,960 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:04:25,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25 WrapperNode [2022-03-18 01:04:25,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:04:25,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:04:25,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:04:25,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:04:25,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:25,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:04:25,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:04:25,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:04:25,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:04:26,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (1/1) ... [2022-03-18 01:04:26,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:04:26,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:26,036 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) [2022-03-18 01:04:26,044 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 [2022-03-18 01:04:26,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:04:26,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:04:26,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 01:04:26,072 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:04:26,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 01:04:26,072 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-03-18 01:04:26,073 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-03-18 01:04:26,073 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2022-03-18 01:04:26,073 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-03-18 01:04:26,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:04:26,073 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-18 01:04:26,073 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-18 01:04:26,073 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-18 01:04:26,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-03-18 01:04:26,074 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:04:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:04:26,133 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:04:26,134 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:04:26,370 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:04:26,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:04:26,374 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-03-18 01:04:26,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:04:26 BoogieIcfgContainer [2022-03-18 01:04:26,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:04:26,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:04:26,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:04:26,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:04:26,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:04:25" (1/3) ... [2022-03-18 01:04:26,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132b8cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:04:26, skipping insertion in model container [2022-03-18 01:04:26,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:04:25" (2/3) ... [2022-03-18 01:04:26,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132b8cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:04:26, skipping insertion in model container [2022-03-18 01:04:26,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:04:26" (3/3) ... [2022-03-18 01:04:26,386 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-03-18 01:04:26,390 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:04:26,390 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:04:26,426 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:04:26,434 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 [2022-03-18 01:04:26,434 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:04:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 01:04:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 01:04:26,460 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:26,460 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:26,461 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 1 times [2022-03-18 01:04:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:26,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [576302661] [2022-03-18 01:04:26,479 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 2 times [2022-03-18 01:04:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:26,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643323605] [2022-03-18 01:04:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 01:04:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 01:04:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 01:04:26,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643323605] [2022-03-18 01:04:26,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643323605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:26,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:26,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:26,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [576302661] [2022-03-18 01:04:26,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [576302661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:26,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:26,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:26,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790560950] [2022-03-18 01:04:26,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:26,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 01:04:26,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 01:04:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 01:04:26,763 INFO L87 Difference]: Start difference. First operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:26,919 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-03-18 01:04:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:04:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-03-18 01:04:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:26,926 INFO L225 Difference]: With dead ends: 127 [2022-03-18 01:04:26,927 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 01:04:26,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:04:26,935 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 81 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:26,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:04:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 01:04:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-03-18 01:04:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 01:04:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-03-18 01:04:26,973 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2022-03-18 01:04:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:26,974 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-03-18 01:04:26,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-03-18 01:04:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 01:04:26,978 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:26,978 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:26,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:04:26,981 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 1 times [2022-03-18 01:04:26,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:26,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [627792400] [2022-03-18 01:04:26,984 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 2 times [2022-03-18 01:04:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:26,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099973702] [2022-03-18 01:04:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:26,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 01:04:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 01:04:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 01:04:27,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099973702] [2022-03-18 01:04:27,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099973702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:27,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:27,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:04:27,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [627792400] [2022-03-18 01:04:27,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [627792400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:27,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:27,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:04:27,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177010063] [2022-03-18 01:04:27,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:27,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:04:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:04:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:04:27,172 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:27,433 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-03-18 01:04:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:04:27,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-03-18 01:04:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:27,437 INFO L225 Difference]: With dead ends: 81 [2022-03-18 01:04:27,437 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 01:04:27,438 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:04:27,439 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:27,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 55 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:04:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 01:04:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-03-18 01:04:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 01:04:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-18 01:04:27,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2022-03-18 01:04:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:27,466 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-18 01:04:27,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-18 01:04:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 01:04:27,468 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:27,468 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:27,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 01:04:27,468 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 1 times [2022-03-18 01:04:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889563434] [2022-03-18 01:04:27,469 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 2 times [2022-03-18 01:04:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380410177] [2022-03-18 01:04:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 01:04:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 01:04:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 01:04:27,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380410177] [2022-03-18 01:04:27,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380410177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691905886] [2022-03-18 01:04:27,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:27,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:27,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:27,902 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) [2022-03-18 01:04:27,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 01:04:27,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 01:04:27,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 01:04:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:28,242 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 16 treesize of output 12 [2022-03-18 01:04:28,452 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-03-18 01:04:28,452 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 24 treesize of output 10 [2022-03-18 01:04:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:28,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:04:28,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691905886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:28,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:04:28,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 26 [2022-03-18 01:04:28,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889563434] [2022-03-18 01:04:28,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889563434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:28,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:28,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:04:28,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816069545] [2022-03-18 01:04:28,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:28,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:04:28,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:04:28,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2022-03-18 01:04:28,518 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:28,623 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-03-18 01:04:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:04:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-03-18 01:04:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:28,626 INFO L225 Difference]: With dead ends: 83 [2022-03-18 01:04:28,626 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 01:04:28,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-03-18 01:04:28,628 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:28,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 498 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-03-18 01:04:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 01:04:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-03-18 01:04:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-18 01:04:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-03-18 01:04:28,650 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 56 [2022-03-18 01:04:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:28,651 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-03-18 01:04:28,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-03-18 01:04:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 01:04:28,652 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:28,652 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:28,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 01:04:28,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:28,860 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash -35265218, now seen corresponding path program 1 times [2022-03-18 01:04:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:28,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608031220] [2022-03-18 01:04:28,862 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash -35265218, now seen corresponding path program 2 times [2022-03-18 01:04:28,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:28,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823937233] [2022-03-18 01:04:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 01:04:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-18 01:04:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 01:04:28,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:28,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823937233] [2022-03-18 01:04:28,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823937233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:28,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215608262] [2022-03-18 01:04:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:28,962 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) [2022-03-18 01:04:28,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 01:04:29,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 01:04:29,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:29,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 01:04:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:29,148 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 16 treesize of output 12 [2022-03-18 01:04:29,392 INFO L356 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-18 01:04:29,392 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 26 treesize of output 10 [2022-03-18 01:04:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 01:04:29,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:04:29,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215608262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:29,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:04:29,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 21 [2022-03-18 01:04:29,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:29,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608031220] [2022-03-18 01:04:29,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608031220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:29,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:29,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 01:04:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97350425] [2022-03-18 01:04:29,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:29,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 01:04:29,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 01:04:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-03-18 01:04:29,454 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:29,659 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-03-18 01:04:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 01:04:29,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2022-03-18 01:04:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:29,666 INFO L225 Difference]: With dead ends: 101 [2022-03-18 01:04:29,666 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 01:04:29,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-03-18 01:04:29,667 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:29,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 623 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-03-18 01:04:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 01:04:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2022-03-18 01:04:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2022-03-18 01:04:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-03-18 01:04:29,680 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 59 [2022-03-18 01:04:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:29,682 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-03-18 01:04:29,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-03-18 01:04:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 01:04:29,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:29,685 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:29,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:29,885 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 [2022-03-18 01:04:29,886 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash 281114777, now seen corresponding path program 1 times [2022-03-18 01:04:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:29,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119753497] [2022-03-18 01:04:29,887 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 281114777, now seen corresponding path program 2 times [2022-03-18 01:04:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:29,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072317352] [2022-03-18 01:04:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 01:04:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 01:04:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 01:04:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:29,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072317352] [2022-03-18 01:04:29,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072317352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:29,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996225163] [2022-03-18 01:04:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:29,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:29,996 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) [2022-03-18 01:04:29,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 01:04:30,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 01:04:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:30,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:30,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996225163] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:30,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:04:30,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 18 [2022-03-18 01:04:30,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119753497] [2022-03-18 01:04:30,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119753497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:30,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:30,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:04:30,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751248907] [2022-03-18 01:04:30,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:30,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:04:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:04:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:04:30,342 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:30,421 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2022-03-18 01:04:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:04:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2022-03-18 01:04:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:30,424 INFO L225 Difference]: With dead ends: 93 [2022-03-18 01:04:30,424 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 01:04:30,425 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-18 01:04:30,426 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:30,426 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 295 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:04:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 01:04:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-18 01:04:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-03-18 01:04:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2022-03-18 01:04:30,443 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 60 [2022-03-18 01:04:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:30,443 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2022-03-18 01:04:30,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2022-03-18 01:04:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 01:04:30,447 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:30,447 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:30,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:30,655 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 [2022-03-18 01:04:30,655 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:30,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash 589581770, now seen corresponding path program 1 times [2022-03-18 01:04:30,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:30,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [754410054] [2022-03-18 01:04:30,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash 589581770, now seen corresponding path program 2 times [2022-03-18 01:04:30,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:30,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387642672] [2022-03-18 01:04:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:30,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 01:04:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-18 01:04:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:30,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387642672] [2022-03-18 01:04:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387642672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018347436] [2022-03-18 01:04:30,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:30,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:30,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:30,729 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) [2022-03-18 01:04:30,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 01:04:30,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:30,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:04:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:30,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:31,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018347436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:31,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:31,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 01:04:31,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:31,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [754410054] [2022-03-18 01:04:31,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [754410054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:31,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:31,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:04:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451322772] [2022-03-18 01:04:31,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:31,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:04:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:04:31,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:04:31,023 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:04:33,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-18 01:04:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:33,429 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-03-18 01:04:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:04:33,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-03-18 01:04:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:33,431 INFO L225 Difference]: With dead ends: 125 [2022-03-18 01:04:33,431 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 01:04:33,431 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-18 01:04:33,432 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 76 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:33,432 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 293 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 01:04:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 01:04:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-03-18 01:04:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-03-18 01:04:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-03-18 01:04:33,441 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 62 [2022-03-18 01:04:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:33,441 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-03-18 01:04:33,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:04:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-03-18 01:04:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 01:04:33,442 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:33,442 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:33,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:33,663 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 [2022-03-18 01:04:33,663 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 1 times [2022-03-18 01:04:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:33,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866501116] [2022-03-18 01:04:33,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 2 times [2022-03-18 01:04:33,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:33,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151282593] [2022-03-18 01:04:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 01:04:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 01:04:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 01:04:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 01:04:33,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151282593] [2022-03-18 01:04:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151282593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944445079] [2022-03-18 01:04:33,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:33,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:33,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:33,795 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) [2022-03-18 01:04:33,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 01:04:33,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:33,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 01:04:33,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:34,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:04:34,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944445079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:34,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:04:34,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2022-03-18 01:04:34,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866501116] [2022-03-18 01:04:34,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866501116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:34,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:34,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:04:34,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218886396] [2022-03-18 01:04:34,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:34,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:04:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:04:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:04:34,018 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 01:04:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:34,118 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-03-18 01:04:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:04:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-03-18 01:04:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:34,120 INFO L225 Difference]: With dead ends: 101 [2022-03-18 01:04:34,120 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 01:04:34,120 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-18 01:04:34,120 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:34,121 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 384 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:04:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 01:04:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-03-18 01:04:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-18 01:04:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2022-03-18 01:04:34,130 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 64 [2022-03-18 01:04:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:34,130 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2022-03-18 01:04:34,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 01:04:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2022-03-18 01:04:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 01:04:34,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:34,131 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:34,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:34,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:34,343 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1758641907, now seen corresponding path program 1 times [2022-03-18 01:04:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1563460878] [2022-03-18 01:04:34,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1758641907, now seen corresponding path program 2 times [2022-03-18 01:04:34,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:34,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212747051] [2022-03-18 01:04:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 01:04:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 01:04:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 01:04:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:34,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212747051] [2022-03-18 01:04:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212747051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:34,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849352585] [2022-03-18 01:04:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:34,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:34,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:34,439 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) [2022-03-18 01:04:34,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 01:04:34,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:04:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 01:04:34,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 01:04:34,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849352585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:34,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:34,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 13 [2022-03-18 01:04:34,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:34,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1563460878] [2022-03-18 01:04:34,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1563460878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:34,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:34,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:04:34,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373110108] [2022-03-18 01:04:34,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:34,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:04:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:04:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:04:34,770 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:04:36,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-18 01:04:38,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-18 01:04:41,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-18 01:04:43,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-18 01:04:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:43,693 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2022-03-18 01:04:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 01:04:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2022-03-18 01:04:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:43,694 INFO L225 Difference]: With dead ends: 107 [2022-03-18 01:04:43,694 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 01:04:43,694 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-18 01:04:43,695 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 42 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:43,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 55 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 404 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2022-03-18 01:04:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 01:04:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-03-18 01:04:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-18 01:04:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-03-18 01:04:43,702 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 63 [2022-03-18 01:04:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:43,702 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-03-18 01:04:43,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:04:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-03-18 01:04:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 01:04:43,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:43,703 INFO L500 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:43,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:43,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:43,915 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 3 times [2022-03-18 01:04:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773334839] [2022-03-18 01:04:43,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 4 times [2022-03-18 01:04:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408875586] [2022-03-18 01:04:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-18 01:04:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:43,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 01:04:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 01:04:44,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408875586] [2022-03-18 01:04:44,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408875586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828663150] [2022-03-18 01:04:44,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:04:44,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:44,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:44,053 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) [2022-03-18 01:04:44,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 01:04:44,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:04:44,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 01:04:44,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 01:04:44,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 01:04:44,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828663150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:44,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:44,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-03-18 01:04:44,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:44,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773334839] [2022-03-18 01:04:44,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773334839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:44,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:44,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:04:44,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904822071] [2022-03-18 01:04:44,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:44,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:04:44,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:44,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:04:44,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-18 01:04:44,635 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:45,149 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-03-18 01:04:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 01:04:45,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-03-18 01:04:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:45,150 INFO L225 Difference]: With dead ends: 95 [2022-03-18 01:04:45,150 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 01:04:45,150 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2022-03-18 01:04:45,151 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:45,151 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:04:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 01:04:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-03-18 01:04:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-18 01:04:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-03-18 01:04:45,159 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 65 [2022-03-18 01:04:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:45,159 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-03-18 01:04:45,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 01:04:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-03-18 01:04:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 01:04:45,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:45,160 INFO L500 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:45,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:45,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:45,360 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 1 times [2022-03-18 01:04:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [427136302] [2022-03-18 01:04:45,361 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:04:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 2 times [2022-03-18 01:04:45,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831679397] [2022-03-18 01:04:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:45,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:04:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:04:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 01:04:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 01:04:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 01:04:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-18 01:04:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:46,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 01:04:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 01:04:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:50,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831679397] [2022-03-18 01:04:50,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831679397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:50,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529951389] [2022-03-18 01:04:50,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:50,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:50,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:50,262 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) [2022-03-18 01:04:50,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 01:04:50,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:50,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 01:04:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:50,863 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 16 treesize of output 12 [2022-03-18 01:04:51,105 INFO L356 Elim1Store]: treesize reduction 151, result has 25.2 percent of original size [2022-03-18 01:04:51,105 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 68 [2022-03-18 01:04:51,669 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 [2022-03-18 01:04:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:04:51,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:52,222 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 01:04:52,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 176 [2022-03-18 01:04:52,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 01:04:52,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 01:04:52,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 01:04:52,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 01:04:52,376 INFO L356 Elim1Store]: treesize reduction 149, result has 55.4 percent of original size [2022-03-18 01:04:52,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 207 treesize of output 425 [2022-03-18 01:04:52,495 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 221 treesize of output 190