/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/loop-lit/gj2007.c.i.p+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:51:37,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:51:37,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:51:37,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 20:51:37,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 20:51:37,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 20:51:37,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 20:51:37,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 20:51:37,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 20:51:37,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 20:51:37,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 20:51:37,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 20:51:37,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:51:37,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:51:37,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:51:37,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:51:37,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:51:37,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:51:37,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:51:37,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:51:37,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:51:37,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:51:37,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:51:37,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:51:37,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:51:37,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:51:37,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:51:37,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:51:37,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:51:37,969 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:51:37,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:51:37,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:51:37,970 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:51:37,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:51:37,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:51:37,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:51:37,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:51:37,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:51:37,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:51:37,971 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:51:37,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:51:37,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:51:37,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:51:37,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:51:37,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:51:37,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:51:37,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:51:37,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:51:37,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:51:37,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:51:37,973 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:51:37,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:51:38,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:51:38,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:51:38,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:51:38,193 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:51:38,193 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:51:38,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2022-02-14 20:51:38,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7923b7ca2/dcace205bea143ad810b8695778b173f/FLAG551ee9dfb [2022-02-14 20:51:38,645 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:51:38,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2022-02-14 20:51:38,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7923b7ca2/dcace205bea143ad810b8695778b173f/FLAG551ee9dfb [2022-02-14 20:51:38,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7923b7ca2/dcace205bea143ad810b8695778b173f [2022-02-14 20:51:38,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:51:38,667 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:51:38,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:51:38,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:51:38,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:51:38,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:38,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b43ec7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38, skipping insertion in model container [2022-02-14 20:51:38,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:38,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:51:38,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:51:38,891 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c[6448,6461] [2022-02-14 20:51:38,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:51:38,927 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:51:38,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c[6448,6461] [2022-02-14 20:51:38,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:51:38,998 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:51:38,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38 WrapperNode [2022-02-14 20:51:38,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:51:38,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:51:38,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:51:38,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:51:39,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:51:39,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:51:39,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:51:39,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:51:39,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (1/1) ... [2022-02-14 20:51:39,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:51:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:51:39,083 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) [2022-02-14 20:51:39,088 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 [2022-02-14 20:51:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:51:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:51:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:51:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 20:51:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:51:39,113 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:51:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:51:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:51:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:51:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 20:51:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:51:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 20:51:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:51:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:51:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:51:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:51:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:51:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:51:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:51:39,164 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:51:39,165 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:51:39,596 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:51:39,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:51:39,601 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-14 20:51:39,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:39 BoogieIcfgContainer [2022-02-14 20:51:39,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:51:39,603 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:51:39,603 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:51:39,605 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:51:39,607 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:39" (1/1) ... [2022-02-14 20:51:39,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:51:39 BasicIcfg [2022-02-14 20:51:39,639 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:51:39,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:51:39,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:51:39,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:51:39,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:51:38" (1/4) ... [2022-02-14 20:51:39,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43619b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:51:39, skipping insertion in model container [2022-02-14 20:51:39,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:51:38" (2/4) ... [2022-02-14 20:51:39,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43619b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:51:39, skipping insertion in model container [2022-02-14 20:51:39,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:51:39" (3/4) ... [2022-02-14 20:51:39,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43619b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:51:39, skipping insertion in model container [2022-02-14 20:51:39,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:51:39" (4/4) ... [2022-02-14 20:51:39,644 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+nlh-reducer.cJordan [2022-02-14 20:51:39,647 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:51:39,647 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:51:39,674 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:51:39,678 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 [2022-02-14 20:51:39,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:51:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 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) [2022-02-14 20:51:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:39,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:39,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:39,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1525673560, now seen corresponding path program 1 times [2022-02-14 20:51:39,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:39,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054413673] [2022-02-14 20:51:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:39,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:39,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:39,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054413673] [2022-02-14 20:51:39,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054413673] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:39,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:39,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:51:39,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503303471] [2022-02-14 20:51:39,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:39,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:51:39,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:51:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:51:39,951 INFO L87 Difference]: Start difference. First operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 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 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 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) [2022-02-14 20:51:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:40,607 INFO L93 Difference]: Finished difference Result 285 states and 486 transitions. [2022-02-14 20:51:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:51:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:40,618 INFO L225 Difference]: With dead ends: 285 [2022-02-14 20:51:40,618 INFO L226 Difference]: Without dead ends: 279 [2022-02-14 20:51:40,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 20:51:40,623 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 408 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:40,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 22 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 20:51:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-14 20:51:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 146. [2022-02-14 20:51:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 142 states have internal predecessors, (211), 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) [2022-02-14 20:51:40,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 214 transitions. [2022-02-14 20:51:40,654 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 214 transitions. Word has length 143 [2022-02-14 20:51:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:40,654 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 214 transitions. [2022-02-14 20:51:40,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 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) [2022-02-14 20:51:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 214 transitions. [2022-02-14 20:51:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:40,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:40,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:40,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:51:40,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1525703351, now seen corresponding path program 1 times [2022-02-14 20:51:40,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:40,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594478128] [2022-02-14 20:51:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:40,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:40,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:40,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:40,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594478128] [2022-02-14 20:51:40,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594478128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:40,774 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:40,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 20:51:40,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271967291] [2022-02-14 20:51:40,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:40,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 20:51:40,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 20:51:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 20:51:40,776 INFO L87 Difference]: Start difference. First operand 146 states and 214 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2022-02-14 20:51:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:41,432 INFO L93 Difference]: Finished difference Result 411 states and 612 transitions. [2022-02-14 20:51:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 20:51:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:41,435 INFO L225 Difference]: With dead ends: 411 [2022-02-14 20:51:41,435 INFO L226 Difference]: Without dead ends: 411 [2022-02-14 20:51:41,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:51:41,436 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 539 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:41,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 16 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 20:51:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-14 20:51:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 150. [2022-02-14 20:51:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 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) [2022-02-14 20:51:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 220 transitions. [2022-02-14 20:51:41,444 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 220 transitions. Word has length 143 [2022-02-14 20:51:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:41,445 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 220 transitions. [2022-02-14 20:51:41,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2022-02-14 20:51:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 220 transitions. [2022-02-14 20:51:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:41,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:41,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:41,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:51:41,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:41,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1554332502, now seen corresponding path program 1 times [2022-02-14 20:51:41,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:41,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902523257] [2022-02-14 20:51:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:41,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:41,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:41,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902523257] [2022-02-14 20:51:41,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902523257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:41,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:41,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 20:51:41,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139100903] [2022-02-14 20:51:41,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:51:41,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:51:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:51:41,587 INFO L87 Difference]: Start difference. First operand 150 states and 220 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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) [2022-02-14 20:51:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:42,371 INFO L93 Difference]: Finished difference Result 541 states and 807 transitions. [2022-02-14 20:51:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 20:51:42,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:42,375 INFO L225 Difference]: With dead ends: 541 [2022-02-14 20:51:42,375 INFO L226 Difference]: Without dead ends: 541 [2022-02-14 20:51:42,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-14 20:51:42,381 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 601 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:42,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 26 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 20:51:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-02-14 20:51:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 156. [2022-02-14 20:51:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.486842105263158) internal successors, (226), 152 states have internal predecessors, (226), 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) [2022-02-14 20:51:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 229 transitions. [2022-02-14 20:51:42,403 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 229 transitions. Word has length 143 [2022-02-14 20:51:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:42,403 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 229 transitions. [2022-02-14 20:51:42,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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) [2022-02-14 20:51:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 229 transitions. [2022-02-14 20:51:42,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:42,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:42,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:42,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 20:51:42,405 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:42,405 INFO L85 PathProgramCache]: Analyzing trace with hash -997824459, now seen corresponding path program 1 times [2022-02-14 20:51:42,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:42,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140310866] [2022-02-14 20:51:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:42,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:42,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:42,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:42,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140310866] [2022-02-14 20:51:42,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140310866] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:42,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:42,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 20:51:42,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133169682] [2022-02-14 20:51:42,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:42,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 20:51:42,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:42,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 20:51:42,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:51:42,577 INFO L87 Difference]: Start difference. First operand 156 states and 229 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 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) [2022-02-14 20:51:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:43,350 INFO L93 Difference]: Finished difference Result 669 states and 999 transitions. [2022-02-14 20:51:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:51:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:43,366 INFO L225 Difference]: With dead ends: 669 [2022-02-14 20:51:43,366 INFO L226 Difference]: Without dead ends: 669 [2022-02-14 20:51:43,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-14 20:51:43,367 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 861 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1201 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:43,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 21 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1201 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 20:51:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-14 20:51:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 164. [2022-02-14 20:51:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.4875) internal successors, (238), 160 states have internal predecessors, (238), 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) [2022-02-14 20:51:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 241 transitions. [2022-02-14 20:51:43,372 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 241 transitions. Word has length 143 [2022-02-14 20:51:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:43,372 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 241 transitions. [2022-02-14 20:51:43,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 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) [2022-02-14 20:51:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 241 transitions. [2022-02-14 20:51:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:43,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:43,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:43,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 20:51:43,374 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:43,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1194337964, now seen corresponding path program 1 times [2022-02-14 20:51:43,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:43,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47209304] [2022-02-14 20:51:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:43,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:43,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:43,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:43,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47209304] [2022-02-14 20:51:43,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47209304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:43,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:43,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 20:51:43,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880249704] [2022-02-14 20:51:43,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:43,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 20:51:43,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 20:51:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-14 20:51:43,497 INFO L87 Difference]: Start difference. First operand 164 states and 241 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 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) [2022-02-14 20:51:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:44,833 INFO L93 Difference]: Finished difference Result 795 states and 1188 transitions. [2022-02-14 20:51:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:51:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:44,836 INFO L225 Difference]: With dead ends: 795 [2022-02-14 20:51:44,836 INFO L226 Difference]: Without dead ends: 795 [2022-02-14 20:51:44,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-02-14 20:51:44,837 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1315 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 2121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2121 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:44,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 16 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2121 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-14 20:51:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-14 20:51:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 174. [2022-02-14 20:51:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.488235294117647) internal successors, (253), 170 states have internal predecessors, (253), 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) [2022-02-14 20:51:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 256 transitions. [2022-02-14 20:51:44,847 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 256 transitions. Word has length 143 [2022-02-14 20:51:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 256 transitions. [2022-02-14 20:51:44,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 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) [2022-02-14 20:51:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 256 transitions. [2022-02-14 20:51:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:44,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:44,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:44,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-14 20:51:44,850 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1065255245, now seen corresponding path program 1 times [2022-02-14 20:51:44,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:44,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254925657] [2022-02-14 20:51:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:44,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:44,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:44,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254925657] [2022-02-14 20:51:44,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254925657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:44,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:44,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 20:51:44,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111728462] [2022-02-14 20:51:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:44,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 20:51:44,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:44,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 20:51:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-14 20:51:44,920 INFO L87 Difference]: Start difference. First operand 174 states and 256 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 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) [2022-02-14 20:51:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:46,410 INFO L93 Difference]: Finished difference Result 919 states and 1374 transitions. [2022-02-14 20:51:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 20:51:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:46,413 INFO L225 Difference]: With dead ends: 919 [2022-02-14 20:51:46,413 INFO L226 Difference]: Without dead ends: 919 [2022-02-14 20:51:46,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-02-14 20:51:46,414 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1369 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 2354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2354 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:46,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 16 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2354 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-14 20:51:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-14 20:51:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 186. [2022-02-14 20:51:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.489010989010989) internal successors, (271), 182 states have internal predecessors, (271), 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) [2022-02-14 20:51:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 274 transitions. [2022-02-14 20:51:46,420 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 274 transitions. Word has length 143 [2022-02-14 20:51:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:46,421 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 274 transitions. [2022-02-14 20:51:46,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 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) [2022-02-14 20:51:46,421 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 274 transitions. [2022-02-14 20:51:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:46,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:46,422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:46,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-14 20:51:46,422 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1570813870, now seen corresponding path program 1 times [2022-02-14 20:51:46,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:46,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948402563] [2022-02-14 20:51:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:46,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:46,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:46,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:46,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948402563] [2022-02-14 20:51:46,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948402563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:46,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:46,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-14 20:51:46,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609232251] [2022-02-14 20:51:46,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:46,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 20:51:46,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 20:51:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:51:46,526 INFO L87 Difference]: Start difference. First operand 186 states and 274 transitions. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 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) [2022-02-14 20:51:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:48,405 INFO L93 Difference]: Finished difference Result 1041 states and 1557 transitions. [2022-02-14 20:51:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 20:51:48,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:48,409 INFO L225 Difference]: With dead ends: 1041 [2022-02-14 20:51:48,410 INFO L226 Difference]: Without dead ends: 1041 [2022-02-14 20:51:48,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-02-14 20:51:48,410 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1426 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 3042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3042 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:48,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1426 Valid, 26 Invalid, 4159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3042 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-14 20:51:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-14 20:51:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 200. [2022-02-14 20:51:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.489795918367347) internal successors, (292), 196 states have internal predecessors, (292), 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) [2022-02-14 20:51:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 295 transitions. [2022-02-14 20:51:48,421 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 295 transitions. Word has length 143 [2022-02-14 20:51:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:48,421 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 295 transitions. [2022-02-14 20:51:48,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 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) [2022-02-14 20:51:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 295 transitions. [2022-02-14 20:51:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:48,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:48,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:48,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-14 20:51:48,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2081348047, now seen corresponding path program 1 times [2022-02-14 20:51:48,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:48,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936144211] [2022-02-14 20:51:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:48,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:48,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:48,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:48,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936144211] [2022-02-14 20:51:48,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936144211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:48,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:48,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-14 20:51:48,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448350764] [2022-02-14 20:51:48,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:48,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 20:51:48,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 20:51:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-02-14 20:51:48,542 INFO L87 Difference]: Start difference. First operand 200 states and 295 transitions. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 10 states have internal predecessors, (140), 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) [2022-02-14 20:51:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:50,590 INFO L93 Difference]: Finished difference Result 1161 states and 1737 transitions. [2022-02-14 20:51:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 20:51:50,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 10 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:50,593 INFO L225 Difference]: With dead ends: 1161 [2022-02-14 20:51:50,594 INFO L226 Difference]: Without dead ends: 1161 [2022-02-14 20:51:50,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-02-14 20:51:50,594 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1609 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 3470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3470 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:50,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 26 Invalid, 4708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3470 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-14 20:51:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-02-14 20:51:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 216. [2022-02-14 20:51:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.490566037735849) internal successors, (316), 212 states have internal predecessors, (316), 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) [2022-02-14 20:51:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2022-02-14 20:51:50,601 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 143 [2022-02-14 20:51:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:50,601 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2022-02-14 20:51:50,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 10 states have internal predecessors, (140), 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) [2022-02-14 20:51:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2022-02-14 20:51:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:50,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:50,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:50,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-14 20:51:50,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:50,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1216546896, now seen corresponding path program 1 times [2022-02-14 20:51:50,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:50,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474076845] [2022-02-14 20:51:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:50,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:50,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474076845] [2022-02-14 20:51:50,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474076845] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:50,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:50,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-14 20:51:50,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125905944] [2022-02-14 20:51:50,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:50,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 20:51:50,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 20:51:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:51:50,693 INFO L87 Difference]: Start difference. First operand 216 states and 319 transitions. Second operand has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 11 states have internal predecessors, (140), 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) [2022-02-14 20:51:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:52,775 INFO L93 Difference]: Finished difference Result 1279 states and 1914 transitions. [2022-02-14 20:51:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 20:51:52,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 11 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:52,779 INFO L225 Difference]: With dead ends: 1279 [2022-02-14 20:51:52,779 INFO L226 Difference]: Without dead ends: 1279 [2022-02-14 20:51:52,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-02-14 20:51:52,780 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1843 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 2829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2829 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:52,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1843 Valid, 26 Invalid, 4186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2829 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-14 20:51:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-02-14 20:51:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 234. [2022-02-14 20:51:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.491304347826087) internal successors, (343), 230 states have internal predecessors, (343), 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) [2022-02-14 20:51:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 346 transitions. [2022-02-14 20:51:52,790 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 346 transitions. Word has length 143 [2022-02-14 20:51:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:52,791 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 346 transitions. [2022-02-14 20:51:52,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 11 states have internal predecessors, (140), 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) [2022-02-14 20:51:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 346 transitions. [2022-02-14 20:51:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:52,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:52,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:52,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-14 20:51:52,792 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash 807722671, now seen corresponding path program 1 times [2022-02-14 20:51:52,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:52,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906217122] [2022-02-14 20:51:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:52,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:52,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:52,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:52,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906217122] [2022-02-14 20:51:52,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906217122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:52,889 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:52,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-14 20:51:52,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115466493] [2022-02-14 20:51:52,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:52,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 20:51:52,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 20:51:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-02-14 20:51:52,890 INFO L87 Difference]: Start difference. First operand 234 states and 346 transitions. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 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) [2022-02-14 20:51:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:55,383 INFO L93 Difference]: Finished difference Result 1395 states and 2088 transitions. [2022-02-14 20:51:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 20:51:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:55,387 INFO L225 Difference]: With dead ends: 1395 [2022-02-14 20:51:55,387 INFO L226 Difference]: Without dead ends: 1395 [2022-02-14 20:51:55,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-02-14 20:51:55,388 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2275 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 3994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3994 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:55,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2275 Valid, 26 Invalid, 5468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3994 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-14 20:51:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-02-14 20:51:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 254. [2022-02-14 20:51:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.492) internal successors, (373), 250 states have internal predecessors, (373), 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) [2022-02-14 20:51:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 376 transitions. [2022-02-14 20:51:55,394 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 376 transitions. Word has length 143 [2022-02-14 20:51:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:55,395 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 376 transitions. [2022-02-14 20:51:55,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 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) [2022-02-14 20:51:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 376 transitions. [2022-02-14 20:51:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:55,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:55,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:55,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-14 20:51:55,396 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1230333618, now seen corresponding path program 1 times [2022-02-14 20:51:55,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:55,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526518418] [2022-02-14 20:51:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:55,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:55,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:55,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526518418] [2022-02-14 20:51:55,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526518418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:55,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:55,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-14 20:51:55,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025138113] [2022-02-14 20:51:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:55,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 20:51:55,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 20:51:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:51:55,499 INFO L87 Difference]: Start difference. First operand 254 states and 376 transitions. Second operand has 14 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 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) [2022-02-14 20:51:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:51:57,919 INFO L93 Difference]: Finished difference Result 1509 states and 2259 transitions. [2022-02-14 20:51:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 20:51:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 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 143 [2022-02-14 20:51:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:51:57,923 INFO L225 Difference]: With dead ends: 1509 [2022-02-14 20:51:57,923 INFO L226 Difference]: Without dead ends: 1509 [2022-02-14 20:51:57,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-02-14 20:51:57,924 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 3422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3422 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:51:57,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2184 Valid, 31 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3422 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-14 20:51:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-02-14 20:51:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 276. [2022-02-14 20:51:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.4926470588235294) internal successors, (406), 272 states have internal predecessors, (406), 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) [2022-02-14 20:51:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 409 transitions. [2022-02-14 20:51:57,931 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 409 transitions. Word has length 143 [2022-02-14 20:51:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:51:57,931 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 409 transitions. [2022-02-14 20:51:57,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 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) [2022-02-14 20:51:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 409 transitions. [2022-02-14 20:51:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:51:57,932 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:51:57,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:51:57,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-14 20:51:57,932 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:51:57,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:51:57,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1297340371, now seen corresponding path program 1 times [2022-02-14 20:51:57,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:51:57,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459052206] [2022-02-14 20:51:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:51:57,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:51:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:58,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:51:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:51:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:51:58,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:51:58,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459052206] [2022-02-14 20:51:58,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459052206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:51:58,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:51:58,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-14 20:51:58,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161815369] [2022-02-14 20:51:58,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:51:58,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 20:51:58,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:51:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 20:51:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-02-14 20:51:58,050 INFO L87 Difference]: Start difference. First operand 276 states and 409 transitions. Second operand has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 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) [2022-02-14 20:52:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:01,252 INFO L93 Difference]: Finished difference Result 1621 states and 2427 transitions. [2022-02-14 20:52:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 20:52:01,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 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 143 [2022-02-14 20:52:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:01,255 INFO L225 Difference]: With dead ends: 1621 [2022-02-14 20:52:01,256 INFO L226 Difference]: Without dead ends: 1621 [2022-02-14 20:52:01,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-02-14 20:52:01,256 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2699 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 6259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2699 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6259 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:01,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 26 Invalid, 7961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6259 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-14 20:52:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-02-14 20:52:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 300. [2022-02-14 20:52:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 296 states have (on average 1.4932432432432432) internal successors, (442), 296 states have internal predecessors, (442), 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) [2022-02-14 20:52:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 445 transitions. [2022-02-14 20:52:01,264 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 445 transitions. Word has length 143 [2022-02-14 20:52:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:01,264 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 445 transitions. [2022-02-14 20:52:01,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 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) [2022-02-14 20:52:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 445 transitions. [2022-02-14 20:52:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:52:01,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:01,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:01,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-14 20:52:01,265 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1266320564, now seen corresponding path program 1 times [2022-02-14 20:52:01,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:01,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595369452] [2022-02-14 20:52:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:01,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:01,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:01,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595369452] [2022-02-14 20:52:01,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595369452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:52:01,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:52:01,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-14 20:52:01,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343562694] [2022-02-14 20:52:01,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:52:01,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 20:52:01,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 20:52:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:52:01,387 INFO L87 Difference]: Start difference. First operand 300 states and 445 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 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) [2022-02-14 20:52:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:04,522 INFO L93 Difference]: Finished difference Result 1731 states and 2592 transitions. [2022-02-14 20:52:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 20:52:04,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 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 143 [2022-02-14 20:52:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:04,526 INFO L225 Difference]: With dead ends: 1731 [2022-02-14 20:52:04,526 INFO L226 Difference]: Without dead ends: 1731 [2022-02-14 20:52:04,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-02-14 20:52:04,527 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2599 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 4847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2599 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4847 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:04,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2599 Valid, 31 Invalid, 6663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4847 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-14 20:52:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-02-14 20:52:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 326. [2022-02-14 20:52:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 322 states have (on average 1.4937888198757765) internal successors, (481), 322 states have internal predecessors, (481), 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) [2022-02-14 20:52:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 484 transitions. [2022-02-14 20:52:04,535 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 484 transitions. Word has length 143 [2022-02-14 20:52:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:04,536 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 484 transitions. [2022-02-14 20:52:04,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 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) [2022-02-14 20:52:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 484 transitions. [2022-02-14 20:52:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:52:04,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:04,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:04,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-14 20:52:04,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1521057109, now seen corresponding path program 1 times [2022-02-14 20:52:04,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:04,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171906869] [2022-02-14 20:52:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:04,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:04,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:04,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:04,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171906869] [2022-02-14 20:52:04,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171906869] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:52:04,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:52:04,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-14 20:52:04,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289575197] [2022-02-14 20:52:04,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:52:04,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 20:52:04,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:04,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 20:52:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-02-14 20:52:04,693 INFO L87 Difference]: Start difference. First operand 326 states and 484 transitions. Second operand has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 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) [2022-02-14 20:52:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:08,532 INFO L93 Difference]: Finished difference Result 1839 states and 2754 transitions. [2022-02-14 20:52:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 20:52:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 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 143 [2022-02-14 20:52:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:08,536 INFO L225 Difference]: With dead ends: 1839 [2022-02-14 20:52:08,536 INFO L226 Difference]: Without dead ends: 1839 [2022-02-14 20:52:08,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-02-14 20:52:08,537 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2839 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 6940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2839 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 8868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6940 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:08,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2839 Valid, 36 Invalid, 8868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6940 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-14 20:52:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-02-14 20:52:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 354. [2022-02-14 20:52:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.4942857142857142) internal successors, (523), 350 states have internal predecessors, (523), 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) [2022-02-14 20:52:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 526 transitions. [2022-02-14 20:52:08,543 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 526 transitions. Word has length 143 [2022-02-14 20:52:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:08,543 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 526 transitions. [2022-02-14 20:52:08,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 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) [2022-02-14 20:52:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 526 transitions. [2022-02-14 20:52:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:52:08,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:08,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:08,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-14 20:52:08,545 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1509740982, now seen corresponding path program 1 times [2022-02-14 20:52:08,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:08,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770807711] [2022-02-14 20:52:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:08,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:08,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:08,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770807711] [2022-02-14 20:52:08,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770807711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:52:08,686 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:52:08,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-14 20:52:08,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41479453] [2022-02-14 20:52:08,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:52:08,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 20:52:08,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 20:52:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-14 20:52:08,688 INFO L87 Difference]: Start difference. First operand 354 states and 526 transitions. Second operand has 18 states, 18 states have (on average 7.777777777777778) internal successors, (140), 17 states have internal predecessors, (140), 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) [2022-02-14 20:52:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:11,952 INFO L93 Difference]: Finished difference Result 1945 states and 2913 transitions. [2022-02-14 20:52:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 20:52:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.777777777777778) internal successors, (140), 17 states have internal predecessors, (140), 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 143 [2022-02-14 20:52:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:11,957 INFO L225 Difference]: With dead ends: 1945 [2022-02-14 20:52:11,957 INFO L226 Difference]: Without dead ends: 1945 [2022-02-14 20:52:11,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-02-14 20:52:11,961 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2802 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 5396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 7428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5396 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:11,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2802 Valid, 31 Invalid, 7428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5396 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-14 20:52:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-02-14 20:52:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 384. [2022-02-14 20:52:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 380 states have (on average 1.4947368421052631) internal successors, (568), 380 states have internal predecessors, (568), 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) [2022-02-14 20:52:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 571 transitions. [2022-02-14 20:52:11,987 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 571 transitions. Word has length 143 [2022-02-14 20:52:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:11,987 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 571 transitions. [2022-02-14 20:52:11,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.777777777777778) internal successors, (140), 17 states have internal predecessors, (140), 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) [2022-02-14 20:52:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 571 transitions. [2022-02-14 20:52:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:52:11,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:11,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:11,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-14 20:52:11,989 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 775122473, now seen corresponding path program 1 times [2022-02-14 20:52:11,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:11,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087981870] [2022-02-14 20:52:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:12,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:12,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:12,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087981870] [2022-02-14 20:52:12,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087981870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:52:12,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:52:12,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-14 20:52:12,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915127262] [2022-02-14 20:52:12,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:52:12,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 20:52:12,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 20:52:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-02-14 20:52:12,137 INFO L87 Difference]: Start difference. First operand 384 states and 571 transitions. Second operand has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 18 states have internal predecessors, (140), 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) [2022-02-14 20:52:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:15,669 INFO L93 Difference]: Finished difference Result 2049 states and 3069 transitions. [2022-02-14 20:52:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 20:52:15,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 18 states have internal predecessors, (140), 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 143 [2022-02-14 20:52:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:15,674 INFO L225 Difference]: With dead ends: 2049 [2022-02-14 20:52:15,674 INFO L226 Difference]: Without dead ends: 2049 [2022-02-14 20:52:15,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-02-14 20:52:15,674 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3463 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 6229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 8363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6229 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:15,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3463 Valid, 26 Invalid, 8363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6229 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-14 20:52:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-02-14 20:52:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 416. [2022-02-14 20:52:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 412 states have (on average 1.4951456310679612) internal successors, (616), 412 states have internal predecessors, (616), 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) [2022-02-14 20:52:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 619 transitions. [2022-02-14 20:52:15,682 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 619 transitions. Word has length 143 [2022-02-14 20:52:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:15,683 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 619 transitions. [2022-02-14 20:52:15,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 18 states have internal predecessors, (140), 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) [2022-02-14 20:52:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 619 transitions. [2022-02-14 20:52:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:52:15,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:15,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:15,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-14 20:52:15,684 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1800614472, now seen corresponding path program 1 times [2022-02-14 20:52:15,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:15,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823159625] [2022-02-14 20:52:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:15,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:16,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:16,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:16,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823159625] [2022-02-14 20:52:16,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823159625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:52:16,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:52:16,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-14 20:52:16,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712766458] [2022-02-14 20:52:16,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:52:16,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-14 20:52:16,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-14 20:52:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2022-02-14 20:52:16,649 INFO L87 Difference]: Start difference. First operand 416 states and 619 transitions. Second operand has 54 states, 54 states have (on average 2.5925925925925926) internal successors, (140), 53 states have internal predecessors, (140), 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) [2022-02-14 20:52:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:18,050 INFO L93 Difference]: Finished difference Result 241 states and 290 transitions. [2022-02-14 20:52:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-14 20:52:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5925925925925926) internal successors, (140), 53 states have internal predecessors, (140), 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 143 [2022-02-14 20:52:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:18,052 INFO L225 Difference]: With dead ends: 241 [2022-02-14 20:52:18,052 INFO L226 Difference]: Without dead ends: 241 [2022-02-14 20:52:18,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3984, Invalid=6936, Unknown=0, NotChecked=0, Total=10920 [2022-02-14 20:52:18,055 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 559 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:18,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 30 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 20:52:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-14 20:52:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-02-14 20:52:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.2109704641350212) internal successors, (287), 237 states have internal predecessors, (287), 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) [2022-02-14 20:52:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 290 transitions. [2022-02-14 20:52:18,059 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 290 transitions. Word has length 143 [2022-02-14 20:52:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:18,059 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 290 transitions. [2022-02-14 20:52:18,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5925925925925926) internal successors, (140), 53 states have internal predecessors, (140), 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) [2022-02-14 20:52:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 290 transitions. [2022-02-14 20:52:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-14 20:52:18,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:18,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:18,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-14 20:52:18,060 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash -544052569, now seen corresponding path program 1 times [2022-02-14 20:52:18,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:18,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101683939] [2022-02-14 20:52:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:18,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:19,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:19,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:19,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101683939] [2022-02-14 20:52:19,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101683939] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:52:19,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:52:19,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-14 20:52:19,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127336159] [2022-02-14 20:52:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:52:19,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-14 20:52:19,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-14 20:52:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-02-14 20:52:19,274 INFO L87 Difference]: Start difference. First operand 241 states and 290 transitions. Second operand has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 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) [2022-02-14 20:52:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:21,585 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2022-02-14 20:52:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-14 20:52:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 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 143 [2022-02-14 20:52:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:21,586 INFO L225 Difference]: With dead ends: 147 [2022-02-14 20:52:21,586 INFO L226 Difference]: Without dead ends: 147 [2022-02-14 20:52:21,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-02-14 20:52:21,589 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 337 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:21,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 31 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 20:52:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-14 20:52:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-02-14 20:52:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 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) [2022-02-14 20:52:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-02-14 20:52:21,591 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2022-02-14 20:52:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:21,592 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-02-14 20:52:21,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 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) [2022-02-14 20:52:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-02-14 20:52:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-14 20:52:21,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:21,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:21,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-14 20:52:21,593 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:21,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1150564772, now seen corresponding path program 1 times [2022-02-14 20:52:21,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:21,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062970368] [2022-02-14 20:52:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:21,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:23,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:23,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:23,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062970368] [2022-02-14 20:52:23,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062970368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:52:23,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488572789] [2022-02-14 20:52:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:23,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:52:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:52:23,104 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) [2022-02-14 20:52:23,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:52:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:23,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 70 conjunts are in the unsatisfiable core [2022-02-14 20:52:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:52:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:23,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:52:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:25,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488572789] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:52:25,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:52:25,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 104 [2022-02-14 20:52:25,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297205535] [2022-02-14 20:52:25,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:52:25,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-14 20:52:25,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-14 20:52:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-02-14 20:52:25,494 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 104 states, 104 states have (on average 2.730769230769231) internal successors, (284), 103 states have internal predecessors, (284), 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) [2022-02-14 20:52:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:29,479 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2022-02-14 20:52:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-14 20:52:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.730769230769231) internal successors, (284), 103 states have internal predecessors, (284), 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 145 [2022-02-14 20:52:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:29,480 INFO L225 Difference]: With dead ends: 210 [2022-02-14 20:52:29,480 INFO L226 Difference]: Without dead ends: 210 [2022-02-14 20:52:29,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5780 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-02-14 20:52:29,485 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 526 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:29,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 26 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 20:52:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-14 20:52:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-14 20:52:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 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) [2022-02-14 20:52:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2022-02-14 20:52:29,487 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 145 [2022-02-14 20:52:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:29,488 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2022-02-14 20:52:29,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.730769230769231) internal successors, (284), 103 states have internal predecessors, (284), 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) [2022-02-14 20:52:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2022-02-14 20:52:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-14 20:52:29,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:29,490 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:29,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 20:52:29,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:52:29,706 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash 163308868, now seen corresponding path program 2 times [2022-02-14 20:52:29,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:29,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754345956] [2022-02-14 20:52:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:30,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:30,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:30,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754345956] [2022-02-14 20:52:30,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754345956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:52:30,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666869071] [2022-02-14 20:52:30,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:52:30,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:52:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:52:30,904 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) [2022-02-14 20:52:30,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:52:31,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:52:31,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:52:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 105 conjunts are in the unsatisfiable core [2022-02-14 20:52:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:52:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:31,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:52:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:32,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666869071] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:52:32,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:52:32,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2022-02-14 20:52:32,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236370016] [2022-02-14 20:52:32,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:52:32,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-14 20:52:32,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-14 20:52:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2022-02-14 20:52:32,639 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 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) [2022-02-14 20:52:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:35,912 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2022-02-14 20:52:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-14 20:52:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 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 209 [2022-02-14 20:52:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:35,928 INFO L225 Difference]: With dead ends: 214 [2022-02-14 20:52:35,928 INFO L226 Difference]: Without dead ends: 213 [2022-02-14 20:52:35,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 414 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=321, Invalid=11235, Unknown=0, NotChecked=0, Total=11556 [2022-02-14 20:52:35,944 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 160 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 10769 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 10821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 10769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:35,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 426 Invalid, 10821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 10769 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-14 20:52:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-14 20:52:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-02-14 20:52:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 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) [2022-02-14 20:52:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2022-02-14 20:52:35,951 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2022-02-14 20:52:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:35,951 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2022-02-14 20:52:35,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 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) [2022-02-14 20:52:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2022-02-14 20:52:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-02-14 20:52:35,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:52:35,953 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:35,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:52:36,180 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,SelfDestructingSolverStorable19 [2022-02-14 20:52:36,180 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:52:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:52:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1974894335, now seen corresponding path program 3 times [2022-02-14 20:52:36,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:52:36,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385898825] [2022-02-14 20:52:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:52:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:52:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:37,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:52:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:52:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:52:37,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:52:37,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385898825] [2022-02-14 20:52:37,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385898825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:52:37,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:52:37,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-14 20:52:37,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412671914] [2022-02-14 20:52:37,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:52:37,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-14 20:52:37,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:52:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-14 20:52:37,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-02-14 20:52:37,156 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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) [2022-02-14 20:52:38,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:52:38,129 INFO L93 Difference]: Finished difference Result 207 states and 206 transitions. [2022-02-14 20:52:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-14 20:52:38,129 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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 211 [2022-02-14 20:52:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:52:38,130 INFO L225 Difference]: With dead ends: 207 [2022-02-14 20:52:38,130 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 20:52:38,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-02-14 20:52:38,132 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 179 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:52:38,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 125 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 20:52:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 20:52:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 20:52:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 20:52:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 20:52:38,133 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-02-14 20:52:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:52:38,133 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 20:52:38,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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) [2022-02-14 20:52:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 20:52:38,133 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 20:52:38,135 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 20:52:38,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-14 20:52:38,138 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:52:38,140 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 20:52:38,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:52:38 BasicIcfg [2022-02-14 20:52:38,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 20:52:38,143 INFO L158 Benchmark]: Toolchain (without parser) took 59476.28ms. Allocated memory was 219.2MB in the beginning and 421.5MB in the end (delta: 202.4MB). Free memory was 169.9MB in the beginning and 195.9MB in the end (delta: -25.9MB). Peak memory consumption was 177.4MB. Max. memory is 8.0GB. [2022-02-14 20:52:38,143 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 219.2MB. Free memory is still 187.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:52:38,143 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.77ms. Allocated memory is still 219.2MB. Free memory was 169.7MB in the beginning and 188.8MB in the end (delta: -19.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-14 20:52:38,143 INFO L158 Benchmark]: Boogie Preprocessor took 32.06ms. Allocated memory is still 219.2MB. Free memory was 188.8MB in the beginning and 186.2MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-14 20:52:38,143 INFO L158 Benchmark]: RCFGBuilder took 570.85ms. Allocated memory is still 219.2MB. Free memory was 186.2MB in the beginning and 146.3MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. [2022-02-14 20:52:38,144 INFO L158 Benchmark]: IcfgTransformer took 35.55ms. Allocated memory is still 219.2MB. Free memory was 146.3MB in the beginning and 141.6MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-02-14 20:52:38,144 INFO L158 Benchmark]: TraceAbstraction took 58502.82ms. Allocated memory was 219.2MB in the beginning and 421.5MB in the end (delta: 202.4MB). Free memory was 141.1MB in the beginning and 195.9MB in the end (delta: -54.8MB). Peak memory consumption was 148.6MB. Max. memory is 8.0GB. [2022-02-14 20:52:38,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 219.2MB. Free memory is still 187.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 330.77ms. Allocated memory is still 219.2MB. Free memory was 169.7MB in the beginning and 188.8MB in the end (delta: -19.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.06ms. Allocated memory is still 219.2MB. Free memory was 188.8MB in the beginning and 186.2MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 570.85ms. Allocated memory is still 219.2MB. Free memory was 186.2MB in the beginning and 146.3MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. * IcfgTransformer took 35.55ms. Allocated memory is still 219.2MB. Free memory was 146.3MB in the beginning and 141.6MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * TraceAbstraction took 58502.82ms. Allocated memory was 219.2MB in the beginning and 421.5MB in the end (delta: 202.4MB). Free memory was 141.1MB in the beginning and 195.9MB in the end (delta: -54.8MB). Peak memory consumption was 148.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 444]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 149 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 58.5s, OverallIterations: 21, TraceHistogramMax: 34, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 45.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30593 SdHoareTripleChecker+Valid, 34.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30593 mSDsluCounter, 1040 SdHoareTripleChecker+Invalid, 28.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 599 mSDsCounter, 55746 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34166 IncrementalHoareTripleChecker+Invalid, 89912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55746 mSolverCounterUnsat, 441 mSDtfsCounter, 34166 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1809 GetRequests, 866 SyntacticMatches, 6 SemanticMatches, 937 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12897 ImplicationChecksByTransitivity, 16.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=416occurred in iteration=16, InterpolantAutomatonStates: 520, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 15250 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 3493 NumberOfCodeBlocks, 3493 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 3822 ConstructedInterpolants, 0 QuantifiedInterpolants, 9705 SizeOfPredicates, 2 NumberOfNonLiveVariables, 938 ConjunctsInSsa, 175 ConjunctsInUnsatCore, 25 InterpolantComputations, 19 PerfectInterpolantSequences, 1156/4426 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 20:52:38,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...