/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:07:16,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:07:16,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:07:16,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 08:07:16,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:07:16,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:07:16,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:07:16,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:07:16,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:07:16,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:07:16,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:07:16,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:07:16,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:07:16,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:07:16,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:07:16,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:07:16,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:07:16,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:07:16,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:07:16,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:07:16,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:07:16,772 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:07:16,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:07:16,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:07:16,773 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:07:16,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:07:16,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:07:16,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:07:16,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:07:16,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:07:16,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:07:16,774 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:07:16,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:07:16,774 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:07:16,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:07:16,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:07:16,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:07:16,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:07:16,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:07:16,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:07:16,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:07:16,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:07:16,780 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:07:16,780 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:07:16,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:07:17,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:07:17,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:07:17,015 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:07:17,016 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:07:17,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-2.i [2022-01-31 08:07:17,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58a88d90d/cf93b27402924b4fa698d4bf35cba50c/FLAG70f060d08 [2022-01-31 08:07:17,428 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:07:17,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-2.i [2022-01-31 08:07:17,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58a88d90d/cf93b27402924b4fa698d4bf35cba50c/FLAG70f060d08 [2022-01-31 08:07:17,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58a88d90d/cf93b27402924b4fa698d4bf35cba50c [2022-01-31 08:07:17,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:07:17,871 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:07:17,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:07:17,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:07:17,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:07:17,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:07:17" (1/1) ... [2022-01-31 08:07:17,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3733c490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:17, skipping insertion in model container [2022-01-31 08:07:17,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:07:17" (1/1) ... [2022-01-31 08:07:17,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:07:17,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:07:18,006 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-2.i[811,824] [2022-01-31 08:07:18,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:07:18,022 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:07:18,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-2.i[811,824] [2022-01-31 08:07:18,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:07:18,069 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:07:18,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18 WrapperNode [2022-01-31 08:07:18,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:07:18,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:07:18,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:07:18,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:07:18,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:07:18,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:07:18,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:07:18,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:07:18,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:07:18,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:18,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:07:18,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:07:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:07:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:07:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:07:18,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:07:18,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:07:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:07:18,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:07:18,231 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:07:18,233 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:07:18,410 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:07:18,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:07:18,415 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:07:18,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:18 BoogieIcfgContainer [2022-01-31 08:07:18,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:07:18,417 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:07:18,417 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:07:18,418 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:07:18,421 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:18" (1/1) ... [2022-01-31 08:07:18,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:07:18 BasicIcfg [2022-01-31 08:07:18,434 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:07:18,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:07:18,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:07:18,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:07:18,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:07:17" (1/4) ... [2022-01-31 08:07:18,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59dec846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:07:18, skipping insertion in model container [2022-01-31 08:07:18,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:07:18" (2/4) ... [2022-01-31 08:07:18,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59dec846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:07:18, skipping insertion in model container [2022-01-31 08:07:18,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:07:18" (3/4) ... [2022-01-31 08:07:18,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59dec846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:07:18, skipping insertion in model container [2022-01-31 08:07:18,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:07:18" (4/4) ... [2022-01-31 08:07:18,440 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.iJordan [2022-01-31 08:07:18,444 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:07:18,445 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:07:18,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:07:18,498 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:07:18,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:07:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:07:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:07:18,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:18,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:18,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1867323789, now seen corresponding path program 1 times [2022-01-31 08:07:18,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:18,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241904067] [2022-01-31 08:07:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:18,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:18,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:18,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241904067] [2022-01-31 08:07:18,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241904067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:18,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:18,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:07:18,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500390440] [2022-01-31 08:07:18,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:18,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:07:18,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:07:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:07:18,744 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:18,770 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-01-31 08:07:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:07:18,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 08:07:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:18,788 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:07:18,788 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 08:07:18,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:07:18,792 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:18,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 08:07:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 08:07:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-31 08:07:18,815 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2022-01-31 08:07:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:18,815 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-31 08:07:18,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-31 08:07:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:07:18,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:18,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:18,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:07:18,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash -978896587, now seen corresponding path program 1 times [2022-01-31 08:07:18,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:18,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220984306] [2022-01-31 08:07:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:18,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:07:18,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220984306] [2022-01-31 08:07:18,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220984306] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:18,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:18,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:07:18,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573027575] [2022-01-31 08:07:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:18,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:07:18,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:07:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:07:18,866 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:18,963 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-31 08:07:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:07:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 08:07:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:18,965 INFO L225 Difference]: With dead ends: 37 [2022-01-31 08:07:18,965 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 08:07:18,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:07:18,969 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:18,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:07:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 08:07:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-31 08:07:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-31 08:07:18,973 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-01-31 08:07:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:18,973 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-31 08:07:18,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-31 08:07:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 08:07:18,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:18,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:18,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:07:18,974 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -591776019, now seen corresponding path program 1 times [2022-01-31 08:07:18,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658571274] [2022-01-31 08:07:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:18,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:19,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:19,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658571274] [2022-01-31 08:07:19,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658571274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820319674] [2022-01-31 08:07:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:19,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:19,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:19,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:07:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:07:19,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:19,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:07:19,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820319674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:19,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:07:19,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:07:19,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709870755] [2022-01-31 08:07:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:19,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:07:19,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:07:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:19,216 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:19,226 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-01-31 08:07:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:07:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 08:07:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:19,229 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:07:19,229 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:07:19,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:19,230 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:19,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:07:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 08:07:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-01-31 08:07:19,233 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 27 [2022-01-31 08:07:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:19,234 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-01-31 08:07:19,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-01-31 08:07:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 08:07:19,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:19,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:19,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:19,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:19,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -788289524, now seen corresponding path program 1 times [2022-01-31 08:07:19,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:19,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457816629] [2022-01-31 08:07:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:19,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:19,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:19,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457816629] [2022-01-31 08:07:19,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457816629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436745601] [2022-01-31 08:07:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:19,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:19,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:19,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:07:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:07:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:19,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:07:19,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436745601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:19,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:19,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:07:19,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299318199] [2022-01-31 08:07:19,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:19,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:07:19,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:07:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:07:19,695 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:19,834 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2022-01-31 08:07:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:07:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 08:07:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:19,836 INFO L225 Difference]: With dead ends: 68 [2022-01-31 08:07:19,836 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 08:07:19,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:07:19,840 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:19,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 28 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:07:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 08:07:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 08:07:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 63 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-01-31 08:07:19,853 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 27 [2022-01-31 08:07:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:19,853 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-01-31 08:07:19,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-01-31 08:07:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 08:07:19,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:19,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:19,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:20,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:07:20,073 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 271473901, now seen corresponding path program 2 times [2022-01-31 08:07:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:20,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275580637] [2022-01-31 08:07:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:20,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:20,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:07:20,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:20,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275580637] [2022-01-31 08:07:20,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275580637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:20,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930125988] [2022-01-31 08:07:20,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:07:20,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:20,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:07:20,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:07:20,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:20,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:07:20,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:07:20,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 08:07:20,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930125988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:20,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:20,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:07:20,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461366980] [2022-01-31 08:07:20,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:20,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:07:20,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:07:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:07:20,554 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:20,896 INFO L93 Difference]: Finished difference Result 146 states and 198 transitions. [2022-01-31 08:07:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:07:20,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 08:07:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:20,900 INFO L225 Difference]: With dead ends: 146 [2022-01-31 08:07:20,900 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 08:07:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:07:20,902 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 487 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:20,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 33 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:07:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 08:07:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-01-31 08:07:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.375886524822695) internal successors, (194), 141 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2022-01-31 08:07:20,919 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 63 [2022-01-31 08:07:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:20,920 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2022-01-31 08:07:20,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2022-01-31 08:07:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 08:07:20,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:20,923 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:20,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:21,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:21,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:21,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1097436033, now seen corresponding path program 3 times [2022-01-31 08:07:21,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:21,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238478485] [2022-01-31 08:07:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:21,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:21,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238478485] [2022-01-31 08:07:21,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238478485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267196436] [2022-01-31 08:07:21,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:07:21,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:21,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:21,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:21,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:07:21,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:07:21,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:21,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 08:07:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:21,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 08:07:21,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-31 08:07:22,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:07:22,588 INFO L387 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 19 treesize of output 19 [2022-01-31 08:07:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-01-31 08:07:22,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:23,405 INFO L353 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-01-31 08:07:23,406 INFO L387 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 41 treesize of output 29 [2022-01-31 08:07:23,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-31 08:07:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-01-31 08:07:23,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267196436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:23,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:23,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-01-31 08:07:23,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328557390] [2022-01-31 08:07:23,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 08:07:23,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 08:07:23,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2022-01-31 08:07:23,524 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:24,452 INFO L93 Difference]: Finished difference Result 389 states and 554 transitions. [2022-01-31 08:07:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 08:07:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 08:07:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:24,455 INFO L225 Difference]: With dead ends: 389 [2022-01-31 08:07:24,455 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 08:07:24,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1338, Invalid=3218, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 08:07:24,457 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 315 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:24,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 102 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 259 Invalid, 0 Unknown, 445 Unchecked, 0.2s Time] [2022-01-31 08:07:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 08:07:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 224. [2022-01-31 08:07:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.3835616438356164) internal successors, (303), 219 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 307 transitions. [2022-01-31 08:07:24,465 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 307 transitions. Word has length 135 [2022-01-31 08:07:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:24,465 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 307 transitions. [2022-01-31 08:07:24,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 307 transitions. [2022-01-31 08:07:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 08:07:24,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:24,468 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:24,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:24,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:24,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:24,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1774898938, now seen corresponding path program 1 times [2022-01-31 08:07:24,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:24,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919423686] [2022-01-31 08:07:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:24,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2022-01-31 08:07:24,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:24,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919423686] [2022-01-31 08:07:24,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919423686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:24,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:24,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:07:24,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382134148] [2022-01-31 08:07:24,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:24,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:07:24,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:07:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:07:24,777 INFO L87 Difference]: Start difference. First operand 224 states and 307 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:24,802 INFO L93 Difference]: Finished difference Result 234 states and 316 transitions. [2022-01-31 08:07:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:07:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 08:07:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:24,803 INFO L225 Difference]: With dead ends: 234 [2022-01-31 08:07:24,803 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 08:07:24,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:07:24,804 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:24,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 39 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 08:07:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-01-31 08:07:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.3640350877192982) internal successors, (311), 228 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 315 transitions. [2022-01-31 08:07:24,809 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 315 transitions. Word has length 141 [2022-01-31 08:07:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:24,809 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 315 transitions. [2022-01-31 08:07:24,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 315 transitions. [2022-01-31 08:07:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 08:07:24,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:24,815 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:24,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 08:07:24,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1632564677, now seen corresponding path program 1 times [2022-01-31 08:07:24,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:24,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406569155] [2022-01-31 08:07:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:24,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:24,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-01-31 08:07:24,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406569155] [2022-01-31 08:07:24,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406569155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:24,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:24,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:07:24,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719867841] [2022-01-31 08:07:24,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:24,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:07:24,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:07:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:24,950 INFO L87 Difference]: Start difference. First operand 233 states and 315 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:25,002 INFO L93 Difference]: Finished difference Result 273 states and 355 transitions. [2022-01-31 08:07:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:07:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 08:07:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:25,004 INFO L225 Difference]: With dead ends: 273 [2022-01-31 08:07:25,004 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 08:07:25,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:07:25,005 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:25,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 08:07:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2022-01-31 08:07:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.2979591836734694) internal successors, (318), 245 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 322 transitions. [2022-01-31 08:07:25,009 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 322 transitions. Word has length 141 [2022-01-31 08:07:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:25,009 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 322 transitions. [2022-01-31 08:07:25,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 322 transitions. [2022-01-31 08:07:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 08:07:25,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:25,010 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:25,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 08:07:25,010 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2025553467, now seen corresponding path program 1 times [2022-01-31 08:07:25,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:25,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596351507] [2022-01-31 08:07:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:25,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:25,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-01-31 08:07:25,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596351507] [2022-01-31 08:07:25,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596351507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:25,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:25,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:07:25,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232770020] [2022-01-31 08:07:25,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:25,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:07:25,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:07:25,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:25,078 INFO L87 Difference]: Start difference. First operand 250 states and 322 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:25,141 INFO L93 Difference]: Finished difference Result 309 states and 391 transitions. [2022-01-31 08:07:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:07:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 08:07:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:25,143 INFO L225 Difference]: With dead ends: 309 [2022-01-31 08:07:25,143 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 08:07:25,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 08:07:25,144 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:25,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 41 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 08:07:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 270. [2022-01-31 08:07:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.3132075471698113) internal successors, (348), 265 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 352 transitions. [2022-01-31 08:07:25,148 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 352 transitions. Word has length 141 [2022-01-31 08:07:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:25,148 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 352 transitions. [2022-01-31 08:07:25,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 352 transitions. [2022-01-31 08:07:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 08:07:25,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:25,149 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:25,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 08:07:25,149 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1381910148, now seen corresponding path program 1 times [2022-01-31 08:07:25,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:25,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231546332] [2022-01-31 08:07:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:25,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:25,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-01-31 08:07:25,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231546332] [2022-01-31 08:07:25,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231546332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:07:25,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:07:25,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:07:25,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985732511] [2022-01-31 08:07:25,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:07:25,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:07:25,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:25,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:07:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:07:25,229 INFO L87 Difference]: Start difference. First operand 270 states and 352 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:25,281 INFO L93 Difference]: Finished difference Result 280 states and 342 transitions. [2022-01-31 08:07:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:07:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 08:07:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:25,282 INFO L225 Difference]: With dead ends: 280 [2022-01-31 08:07:25,282 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 08:07:25,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:07:25,283 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:25,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 44 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:07:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 08:07:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 250. [2022-01-31 08:07:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.2571428571428571) internal successors, (308), 245 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 312 transitions. [2022-01-31 08:07:25,287 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 312 transitions. Word has length 141 [2022-01-31 08:07:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:25,287 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 312 transitions. [2022-01-31 08:07:25,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 312 transitions. [2022-01-31 08:07:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 08:07:25,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:25,289 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:25,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 08:07:25,289 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash 360900187, now seen corresponding path program 1 times [2022-01-31 08:07:25,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:25,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820937445] [2022-01-31 08:07:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:25,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:25,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820937445] [2022-01-31 08:07:25,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820937445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098289998] [2022-01-31 08:07:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:25,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:25,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:25,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:07:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:07:25,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:25,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-01-31 08:07:26,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098289998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:26,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:26,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-31 08:07:26,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380151322] [2022-01-31 08:07:26,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:26,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:07:26,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:07:26,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 08:07:26,137 INFO L87 Difference]: Start difference. First operand 250 states and 312 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:27,074 INFO L93 Difference]: Finished difference Result 700 states and 871 transitions. [2022-01-31 08:07:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 08:07:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 08:07:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:27,076 INFO L225 Difference]: With dead ends: 700 [2022-01-31 08:07:27,076 INFO L226 Difference]: Without dead ends: 700 [2022-01-31 08:07:27,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 08:07:27,078 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1381 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:27,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 53 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:07:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-31 08:07:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 658. [2022-01-31 08:07:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 653 states have (on average 1.2618683001531394) internal successors, (824), 653 states have internal predecessors, (824), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 828 transitions. [2022-01-31 08:07:27,086 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 828 transitions. Word has length 141 [2022-01-31 08:07:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:27,087 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 828 transitions. [2022-01-31 08:07:27,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 828 transitions. [2022-01-31 08:07:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 08:07:27,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:27,090 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:27,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:27,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 08:07:27,303 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash -944205955, now seen corresponding path program 2 times [2022-01-31 08:07:27,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:27,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332959984] [2022-01-31 08:07:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:27,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3836 trivial. 0 not checked. [2022-01-31 08:07:27,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:27,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332959984] [2022-01-31 08:07:27,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332959984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:27,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030672512] [2022-01-31 08:07:27,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:07:27,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:27,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:27,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:27,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:07:27,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:07:27,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 08:07:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3836 trivial. 0 not checked. [2022-01-31 08:07:28,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3836 trivial. 0 not checked. [2022-01-31 08:07:29,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030672512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:29,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:29,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-01-31 08:07:29,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738893366] [2022-01-31 08:07:29,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:29,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 08:07:29,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 08:07:29,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 08:07:29,620 INFO L87 Difference]: Start difference. First operand 658 states and 828 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:32,390 INFO L93 Difference]: Finished difference Result 1414 states and 1765 transitions. [2022-01-31 08:07:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 08:07:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 08:07:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:32,394 INFO L225 Difference]: With dead ends: 1414 [2022-01-31 08:07:32,395 INFO L226 Difference]: Without dead ends: 1414 [2022-01-31 08:07:32,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 08:07:32,398 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3849 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3849 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:32,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3849 Valid, 38 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 08:07:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-01-31 08:07:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1348. [2022-01-31 08:07:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1343 states have (on average 1.261355174981385) internal successors, (1694), 1343 states have internal predecessors, (1694), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1698 transitions. [2022-01-31 08:07:32,415 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1698 transitions. Word has length 351 [2022-01-31 08:07:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:32,415 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 1698 transitions. [2022-01-31 08:07:32,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 61 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1698 transitions. [2022-01-31 08:07:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-01-31 08:07:32,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:32,424 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:32,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:32,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:32,636 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1047624801, now seen corresponding path program 3 times [2022-01-31 08:07:32,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:32,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765605198] [2022-01-31 08:07:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:32,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:34,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 16646 trivial. 0 not checked. [2022-01-31 08:07:34,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:34,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765605198] [2022-01-31 08:07:34,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765605198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:34,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634125922] [2022-01-31 08:07:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:07:34,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:34,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:34,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:34,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:07:34,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:07:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:07:34,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:07:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:34,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 08:07:37,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:07:37,104 INFO L387 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 41 treesize of output 33 [2022-01-31 08:07:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 229 proven. 343 refuted. 0 times theorem prover too weak. 19438 trivial. 0 not checked. [2022-01-31 08:07:37,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:40,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-01-31 08:07:40,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-31 08:07:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 172 proven. 400 refuted. 0 times theorem prover too weak. 19438 trivial. 0 not checked. [2022-01-31 08:07:40,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634125922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:40,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:40,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 9, 9] total 74 [2022-01-31 08:07:40,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370153829] [2022-01-31 08:07:40,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:40,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 08:07:40,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 08:07:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2298, Invalid=3104, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 08:07:40,561 INFO L87 Difference]: Start difference. First operand 1348 states and 1698 transitions. Second operand has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 73 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:07:43,783 INFO L93 Difference]: Finished difference Result 2861 states and 3560 transitions. [2022-01-31 08:07:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 08:07:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 73 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 711 [2022-01-31 08:07:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:07:43,791 INFO L225 Difference]: With dead ends: 2861 [2022-01-31 08:07:43,791 INFO L226 Difference]: Without dead ends: 2861 [2022-01-31 08:07:43,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1674 GetRequests, 1534 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6921, Invalid=12819, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 08:07:43,797 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2786 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2313 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:07:43,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 78 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 846 Invalid, 0 Unknown, 2313 Unchecked, 0.8s Time] [2022-01-31 08:07:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2022-01-31 08:07:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 1384. [2022-01-31 08:07:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1379 states have (on average 1.26178390137781) internal successors, (1740), 1379 states have internal predecessors, (1740), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1744 transitions. [2022-01-31 08:07:43,819 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1744 transitions. Word has length 711 [2022-01-31 08:07:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:07:43,819 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1744 transitions. [2022-01-31 08:07:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.4864864864864864) internal successors, (184), 73 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:07:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1744 transitions. [2022-01-31 08:07:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2022-01-31 08:07:43,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:07:43,830 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 58, 58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:07:43,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:07:44,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:44,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:07:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:07:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -124003874, now seen corresponding path program 1 times [2022-01-31 08:07:44,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:07:44,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047049159] [2022-01-31 08:07:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:44,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:07:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:45,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:07:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20127 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 16646 trivial. 0 not checked. [2022-01-31 08:07:45,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:07:45,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047049159] [2022-01-31 08:07:45,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047049159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:07:45,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315600873] [2022-01-31 08:07:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:07:45,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:07:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:07:45,409 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:07:45,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:07:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:07:45,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 2236 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-31 08:07:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:07:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20127 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 16646 trivial. 0 not checked. [2022-01-31 08:07:46,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:07:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20127 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 16646 trivial. 0 not checked. [2022-01-31 08:07:50,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315600873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:07:50,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:07:50,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-01-31 08:07:50,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899353363] [2022-01-31 08:07:50,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:07:50,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 08:07:50,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:07:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 08:07:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 08:07:50,370 INFO L87 Difference]: Start difference. First operand 1384 states and 1744 transitions. Second operand has 124 states, 124 states have (on average 2.1451612903225805) internal successors, (266), 123 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:03,495 INFO L93 Difference]: Finished difference Result 3932 states and 4896 transitions. [2022-01-31 08:08:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 08:08:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.1451612903225805) internal successors, (266), 123 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 713 [2022-01-31 08:08:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:03,505 INFO L225 Difference]: With dead ends: 3932 [2022-01-31 08:08:03,505 INFO L226 Difference]: Without dead ends: 3932 [2022-01-31 08:08:03,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1609 GetRequests, 1367 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9264 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=22266, Invalid=37026, Unknown=0, NotChecked=0, Total=59292 [2022-01-31 08:08:03,513 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8650 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 1605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8650 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1605 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:03,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8650 Valid, 43 Invalid, 3671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1605 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 08:08:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2022-01-31 08:08:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2775. [2022-01-31 08:08:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2770 states have (on average 1.2613718411552346) internal successors, (3494), 2770 states have internal predecessors, (3494), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 3498 transitions. [2022-01-31 08:08:03,544 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 3498 transitions. Word has length 713 [2022-01-31 08:08:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:03,545 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 3498 transitions. [2022-01-31 08:08:03,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.1451612903225805) internal successors, (266), 123 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 3498 transitions. [2022-01-31 08:08:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1456 [2022-01-31 08:08:03,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:03,560 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 120, 120, 120, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:03,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:03,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 08:08:03,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1381906908, now seen corresponding path program 2 times [2022-01-31 08:08:03,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:03,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346499335] [2022-01-31 08:08:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:03,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:08,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 86040 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 71640 trivial. 0 not checked. [2022-01-31 08:08:08,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346499335] [2022-01-31 08:08:08,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346499335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904640196] [2022-01-31 08:08:08,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:08:08,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:08,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:08,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:08:09,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:08:09,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:09,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 4521 conjuncts, 122 conjunts are in the unsatisfiable core [2022-01-31 08:08:09,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 86040 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 71640 trivial. 0 not checked. [2022-01-31 08:08:10,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 86040 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 71640 trivial. 0 not checked. [2022-01-31 08:08:24,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904640196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:24,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:24,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 123, 123] total 246 [2022-01-31 08:08:24,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352410908] [2022-01-31 08:08:24,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:24,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 246 states [2022-01-31 08:08:24,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2022-01-31 08:08:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29892, Invalid=30378, Unknown=0, NotChecked=0, Total=60270 [2022-01-31 08:08:24,259 INFO L87 Difference]: Start difference. First operand 2775 states and 3498 transitions. Second operand has 246 states, 246 states have (on average 2.073170731707317) internal successors, (510), 245 states have internal predecessors, (510), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:10:13,923 INFO L93 Difference]: Finished difference Result 6568 states and 8146 transitions. [2022-01-31 08:10:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2022-01-31 08:10:13,924 INFO L78 Accepts]: Start accepts. Automaton has has 246 states, 246 states have (on average 2.073170731707317) internal successors, (510), 245 states have internal predecessors, (510), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1455 [2022-01-31 08:10:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:10:13,937 INFO L225 Difference]: With dead ends: 6568 [2022-01-31 08:10:13,938 INFO L226 Difference]: Without dead ends: 6568 [2022-01-31 08:10:13,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3276 GetRequests, 2790 SyntacticMatches, 0 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37141 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=89183, Invalid=148473, Unknown=0, NotChecked=0, Total=237656 [2022-01-31 08:10:13,949 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20113 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4150 mSolverCounterSat, 3635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20113 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3635 IncrementalHoareTripleChecker+Valid, 4150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:10:13,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20113 Valid, 38 Invalid, 7785 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3635 Valid, 4150 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-01-31 08:10:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6568 states. [2022-01-31 08:10:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6568 to 5581. [2022-01-31 08:10:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5581 states, 5576 states have (on average 1.2611190817790532) internal successors, (7032), 5576 states have internal predecessors, (7032), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5581 states to 5581 states and 7036 transitions. [2022-01-31 08:10:14,011 INFO L78 Accepts]: Start accepts. Automaton has 5581 states and 7036 transitions. Word has length 1455 [2022-01-31 08:10:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:10:14,012 INFO L470 AbstractCegarLoop]: Abstraction has 5581 states and 7036 transitions. [2022-01-31 08:10:14,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 246 states, 246 states have (on average 2.073170731707317) internal successors, (510), 245 states have internal predecessors, (510), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:10:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5581 states and 7036 transitions. [2022-01-31 08:10:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2920 [2022-01-31 08:10:14,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:10:14,064 INFO L514 BasicCegarLoop]: trace histogram [242, 242, 242, 242, 242, 242, 242, 242, 242, 241, 241, 241, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:10:14,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:10:14,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 08:10:14,278 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:10:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:10:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1497802896, now seen corresponding path program 3 times [2022-01-31 08:10:14,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:10:14,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579730314] [2022-01-31 08:10:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:10:14,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:10:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:10:33,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:10:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:10:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 350658 backedges. 0 proven. 58564 refuted. 0 times theorem prover too weak. 292094 trivial. 0 not checked. [2022-01-31 08:10:33,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:10:33,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579730314] [2022-01-31 08:10:33,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579730314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:10:33,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339695407] [2022-01-31 08:10:33,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:10:33,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:10:33,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:10:33,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:10:33,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:10:33,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 08:10:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:10:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 08:10:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:10:33,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 08:10:35,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-31 08:10:36,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-31 08:10:49,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:10:49,992 INFO L387 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 24 [2022-01-31 08:10:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 350658 backedges. 961 proven. 3133 refuted. 0 times theorem prover too weak. 346564 trivial. 0 not checked. [2022-01-31 08:10:50,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:11:10,230 INFO L353 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2022-01-31 08:11:10,231 INFO L387 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 41 treesize of output 29 [2022-01-31 08:11:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 350658 backedges. 0 proven. 4094 refuted. 0 times theorem prover too weak. 346564 trivial. 0 not checked. [2022-01-31 08:11:12,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339695407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:11:12,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:11:12,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [246, 15, 15] total 266 [2022-01-31 08:11:12,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807178392] [2022-01-31 08:11:12,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:11:12,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 266 states [2022-01-31 08:11:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:11:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 266 interpolants. [2022-01-31 08:11:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32647, Invalid=37835, Unknown=8, NotChecked=0, Total=70490 [2022-01-31 08:11:12,017 INFO L87 Difference]: Start difference. First operand 5581 states and 7036 transitions. Second operand has 266 states, 266 states have (on average 2.1052631578947367) internal successors, (560), 265 states have internal predecessors, (560), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:15:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:15:51,538 INFO L93 Difference]: Finished difference Result 13570 states and 16722 transitions. [2022-01-31 08:15:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 368 states. [2022-01-31 08:15:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 266 states, 266 states have (on average 2.1052631578947367) internal successors, (560), 265 states have internal predecessors, (560), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 2919 [2022-01-31 08:15:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:15:51,573 INFO L225 Difference]: With dead ends: 13570 [2022-01-31 08:15:51,573 INFO L226 Difference]: Without dead ends: 13570 [2022-01-31 08:15:51,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6698 GetRequests, 6067 SyntacticMatches, 5 SemanticMatches, 626 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 71120 ImplicationChecksByTransitivity, 287.2s TimeCoverageRelationStatistics Valid=146710, Invalid=246944, Unknown=102, NotChecked=0, Total=393756 [2022-01-31 08:15:51,596 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1730 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 1145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 888 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 08:15:51,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 187 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1145 Valid, 534 Invalid, 0 Unknown, 888 Unchecked, 0.9s Time] [2022-01-31 08:15:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13570 states. [2022-01-31 08:15:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13570 to 10348. [2022-01-31 08:15:51,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10348 states, 10343 states have (on average 1.2789326114280188) internal successors, (13228), 10343 states have internal predecessors, (13228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:15:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10348 states to 10348 states and 13232 transitions. [2022-01-31 08:15:51,727 INFO L78 Accepts]: Start accepts. Automaton has 10348 states and 13232 transitions. Word has length 2919 [2022-01-31 08:15:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:15:51,728 INFO L470 AbstractCegarLoop]: Abstraction has 10348 states and 13232 transitions. [2022-01-31 08:15:51,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 266 states, 266 states have (on average 2.1052631578947367) internal successors, (560), 265 states have internal predecessors, (560), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:15:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 10348 states and 13232 transitions. [2022-01-31 08:15:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2922 [2022-01-31 08:15:51,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:15:51,788 INFO L514 BasicCegarLoop]: trace histogram [243, 243, 242, 242, 242, 242, 242, 242, 241, 241, 241, 241, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:15:51,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:15:52,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 08:15:52,004 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:15:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:15:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1092125873, now seen corresponding path program 4 times [2022-01-31 08:15:52,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:15:52,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048815069] [2022-01-31 08:15:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:15:52,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:15:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:16:11,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:16:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:16:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 351143 backedges. 0 proven. 59049 refuted. 0 times theorem prover too weak. 292094 trivial. 0 not checked. [2022-01-31 08:16:11,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:16:11,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048815069] [2022-01-31 08:16:11,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048815069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:16:11,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82283662] [2022-01-31 08:16:11,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:16:11,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:16:11,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:16:11,634 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:16:11,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:16:12,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:16:12,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:16:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 5603 conjuncts, 984 conjunts are in the unsatisfiable core [2022-01-31 08:16:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:16:33,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 08:16:33,943 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 08:16:33,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 08:17:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 351143 backedges. 2884 proven. 289205 refuted. 0 times theorem prover too weak. 59054 trivial. 0 not checked. [2022-01-31 08:17:41,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:19:19,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-01-31 08:19:19,601 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 08:19:19,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49