/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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 14:40:01,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:40:01,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:40:01,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 14:40:01,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 14:40:01,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 14:40:01,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 14:40:02,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 14:40:02,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 14:40:02,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 14:40:02,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 14:40:02,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 14:40:02,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 14:40:02,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 14:40:02,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 14:40:02,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 14:40:02,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 14:40:02,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 14:40:02,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 14:40:02,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 14:40:02,027 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 14:40:02,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 14:40:02,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 14:40:02,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 14:40:02,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 14:40:02,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 14:40:02,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 14:40:02,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 14:40:02,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 14:40:02,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:40:02,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:40:02,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:40:02,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:40:02,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:40:02,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:40:02,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:40:02,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:40:02,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:40:02,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:40:02,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:40:02,064 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:40:02,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:40:02,064 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:40:02,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:40:02,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:40:02,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:40:02,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:40:02,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:40:02,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:40:02,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:40:02,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:40:02,066 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:40:02,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:40:02,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:40:02,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:40:02,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:40:02,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:40:02,340 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:40:02,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2022-03-17 14:40:02,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ea9561d/f3d69c574c2b4a14a3a631c9d380d660/FLAGb58859b3d [2022-03-17 14:40:02,836 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:40:02,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c [2022-03-17 14:40:02,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ea9561d/f3d69c574c2b4a14a3a631c9d380d660/FLAGb58859b3d [2022-03-17 14:40:02,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00ea9561d/f3d69c574c2b4a14a3a631c9d380d660 [2022-03-17 14:40:02,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:40:02,864 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:40:02,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:40:02,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:40:02,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:40:02,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:40:02" (1/1) ... [2022-03-17 14:40:02,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d288b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:02, skipping insertion in model container [2022-03-17 14:40:02,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:40:02" (1/1) ... [2022-03-17 14:40:02,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:40:02,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:40:03,082 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c[609,622] [2022-03-17 14:40:03,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:40:03,096 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:40:03,114 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c[609,622] [2022-03-17 14:40:03,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:40:03,135 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:40:03,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03 WrapperNode [2022-03-17 14:40:03,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:40:03,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:40:03,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:40:03,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:40:03,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:40:03,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:40:03,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:40:03,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:40:03,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:40:03,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:03,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 14:40:03,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 14:40:03,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:40:03,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:40:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:40:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:40:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:40:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:40:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:40:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:40:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-17 14:40:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:40:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:40:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:40:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:40:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:40:03,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:40:03,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:40:03,350 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:40:03,351 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:40:03,505 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:40:03,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:40:03,525 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 14:40:03,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:03 BoogieIcfgContainer [2022-03-17 14:40:03,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:40:03,527 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:40:03,527 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:40:03,528 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:40:03,531 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:40:03 BasicIcfg [2022-03-17 14:40:03,551 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:40:03,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:40:03,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:40:03,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:40:03,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:40:02" (1/4) ... [2022-03-17 14:40:03,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f0f77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:40:03, skipping insertion in model container [2022-03-17 14:40:03,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (2/4) ... [2022-03-17 14:40:03,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f0f77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:40:03, skipping insertion in model container [2022-03-17 14:40:03,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:03" (3/4) ... [2022-03-17 14:40:03,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f0f77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:40:03, skipping insertion in model container [2022-03-17 14:40:03,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:40:03" (4/4) ... [2022-03-17 14:40:03,558 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.cJordan [2022-03-17 14:40:03,562 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:40:03,563 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:40:03,632 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:40:03,640 INFO L340 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 [2022-03-17 14:40:03,640 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:40:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 14:40:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-17 14:40:03,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:03,667 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:03,667 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:03,673 INFO L85 PathProgramCache]: Analyzing trace with hash -282074373, now seen corresponding path program 1 times [2022-03-17 14:40:03,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:03,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690029080] [2022-03-17 14:40:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:03,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:03,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:03,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:03,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690029080] [2022-03-17 14:40:03,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690029080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:40:03,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:40:03,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 14:40:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523026820] [2022-03-17 14:40:03,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:40:03,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 14:40:03,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 14:40:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 14:40:03,938 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:03,993 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-03-17 14:40:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 14:40:03,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-03-17 14:40:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:04,001 INFO L225 Difference]: With dead ends: 27 [2022-03-17 14:40:04,001 INFO L226 Difference]: Without dead ends: 21 [2022-03-17 14:40:04,003 INFO L911 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 [2022-03-17 14:40:04,007 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:04,008 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:40:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-17 14:40:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2022-03-17 14:40:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 14:40:04,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-03-17 14:40:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:04,037 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 14:40:04,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 14:40:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-17 14:40:04,038 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:04,039 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:04,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:40:04,040 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash -282044551, now seen corresponding path program 1 times [2022-03-17 14:40:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:04,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448827895] [2022-03-17 14:40:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:04,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:04,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:04,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448827895] [2022-03-17 14:40:04,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448827895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:40:04,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:40:04,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 14:40:04,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361047140] [2022-03-17 14:40:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:40:04,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 14:40:04,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:04,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 14:40:04,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 14:40:04,123 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:04,162 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-03-17 14:40:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 14:40:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-03-17 14:40:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:04,163 INFO L225 Difference]: With dead ends: 19 [2022-03-17 14:40:04,163 INFO L226 Difference]: Without dead ends: 19 [2022-03-17 14:40:04,164 INFO L911 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 [2022-03-17 14:40:04,165 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:04,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:40:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-17 14:40:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2022-03-17 14:40:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-17 14:40:04,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2022-03-17 14:40:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:04,170 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-17 14:40:04,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-17 14:40:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 14:40:04,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:04,171 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:04,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 14:40:04,171 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1097051654, now seen corresponding path program 1 times [2022-03-17 14:40:04,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:04,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726917631] [2022-03-17 14:40:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:40:04,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:04,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726917631] [2022-03-17 14:40:04,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726917631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:04,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629925267] [2022-03-17 14:40:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:04,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:04,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:04,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:40:04,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:40:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 14:40:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:40:04,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:40:04,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629925267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:04,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:04,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 14:40:04,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516523059] [2022-03-17 14:40:04,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:04,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 14:40:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 14:40:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-17 14:40:04,519 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 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) [2022-03-17 14:40:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:04,655 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-03-17 14:40:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 14:40:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 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 15 [2022-03-17 14:40:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:04,656 INFO L225 Difference]: With dead ends: 31 [2022-03-17 14:40:04,657 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 14:40:04,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-17 14:40:04,658 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:04,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 14:40:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-17 14:40:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-17 14:40:04,662 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 15 [2022-03-17 14:40:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:04,663 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-17 14:40:04,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 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) [2022-03-17 14:40:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-17 14:40:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 14:40:04,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:04,664 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:04,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 14:40:04,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:04,884 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2017057343, now seen corresponding path program 2 times [2022-03-17 14:40:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:04,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017394001] [2022-03-17 14:40:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-17 14:40:05,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:05,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017394001] [2022-03-17 14:40:05,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017394001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:05,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787492717] [2022-03-17 14:40:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:40:05,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:05,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:40:05,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:40:05,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:40:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 14:40:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:05,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:40:05,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787492717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:05,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:05,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-17 14:40:05,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812724287] [2022-03-17 14:40:05,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:05,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 14:40:05,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:05,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 14:40:05,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-17 14:40:05,603 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 1 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) [2022-03-17 14:40:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:06,061 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-03-17 14:40:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 14:40:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 1 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 30 [2022-03-17 14:40:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:06,063 INFO L225 Difference]: With dead ends: 61 [2022-03-17 14:40:06,063 INFO L226 Difference]: Without dead ends: 61 [2022-03-17 14:40:06,063 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-03-17 14:40:06,064 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:06,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 71 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:40:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-17 14:40:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-17 14:40:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-17 14:40:06,071 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 30 [2022-03-17 14:40:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:06,071 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-17 14:40:06,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 1 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) [2022-03-17 14:40:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-17 14:40:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-17 14:40:06,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:06,073 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:06,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:06,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 14:40:06,294 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1848630061, now seen corresponding path program 3 times [2022-03-17 14:40:06,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:06,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726617367] [2022-03-17 14:40:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:06,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-17 14:40:06,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:06,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726617367] [2022-03-17 14:40:06,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726617367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:06,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599783838] [2022-03-17 14:40:06,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 14:40:06,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:06,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:06,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:40:06,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 14:40:08,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-17 14:40:08,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:08,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 14:40:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-17 14:40:08,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-17 14:40:09,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599783838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:09,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:09,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-17 14:40:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278357789] [2022-03-17 14:40:09,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:09,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 14:40:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 14:40:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-03-17 14:40:09,035 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 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) [2022-03-17 14:40:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:13,901 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-03-17 14:40:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 14:40:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 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 60 [2022-03-17 14:40:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:13,902 INFO L225 Difference]: With dead ends: 121 [2022-03-17 14:40:13,902 INFO L226 Difference]: Without dead ends: 121 [2022-03-17 14:40:13,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=468, Invalid=864, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 14:40:13,904 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 262 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:13,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 218 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 14:40:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-17 14:40:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-17 14:40:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-03-17 14:40:13,913 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 60 [2022-03-17 14:40:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:13,913 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-03-17 14:40:13,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 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) [2022-03-17 14:40:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-03-17 14:40:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-17 14:40:13,916 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:13,916 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:13,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:14,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:14,124 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 735577605, now seen corresponding path program 4 times [2022-03-17 14:40:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:14,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039724790] [2022-03-17 14:40:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:14,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-03-17 14:40:14,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039724790] [2022-03-17 14:40:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039724790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497965335] [2022-03-17 14:40:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 14:40:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:14,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:40:14,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 14:40:15,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 14:40:15,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-17 14:40:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-03-17 14:40:16,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-03-17 14:40:17,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497965335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:17,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:17,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-17 14:40:17,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410136827] [2022-03-17 14:40:17,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:17,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-17 14:40:17,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-17 14:40:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 14:40:17,363 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 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) [2022-03-17 14:41:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:41:54,263 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2022-03-17 14:41:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-17 14:41:54,264 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 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 120 [2022-03-17 14:41:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:41:54,265 INFO L225 Difference]: With dead ends: 241 [2022-03-17 14:41:54,266 INFO L226 Difference]: Without dead ends: 241 [2022-03-17 14:41:54,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 96.0s TimeCoverageRelationStatistics Valid=1799, Invalid=3456, Unknown=1, NotChecked=0, Total=5256 [2022-03-17 14:41:54,268 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 1239 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:41:54,269 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 689 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-17 14:41:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-17 14:41:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-03-17 14:41:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 237 states have internal predecessors, (239), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:41:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-03-17 14:41:54,281 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 120 [2022-03-17 14:41:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:41:54,282 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-03-17 14:41:54,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 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) [2022-03-17 14:41:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-03-17 14:41:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-03-17 14:41:54,285 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:41:54,285 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:41:54,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 14:41:54,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:54,499 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:41:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:41:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1957714869, now seen corresponding path program 5 times [2022-03-17 14:41:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:41:54,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664831525] [2022-03-17 14:41:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:54,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:41:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:41:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-03-17 14:41:56,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:41:56,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664831525] [2022-03-17 14:41:56,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664831525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:41:56,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755848396] [2022-03-17 14:41:56,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 14:41:56,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:56,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:41:56,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:41:56,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process