/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:51:45,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:51:45,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:51:46,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:51:46,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:51:46,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:51:46,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:51:46,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:51:46,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:51:46,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:51:46,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:51:46,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:51:46,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:51:46,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:51:46,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:51:46,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:51:46,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:51:46,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:51:46,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:51:46,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:51:46,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:51:46,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:51:46,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:51:46,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:51:46,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 20:51:46,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:51:46,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:51:46,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:51:46,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:51:46,090 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:51:46,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:51:46,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:51:46,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:51:46,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:51:46,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:51:46,093 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:51:46,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:51:46,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:51:46,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:51:46,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:51:46,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:51:46,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:51:46,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:51:46,094 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:51:46,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:51:46,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:51:46,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:51:46,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:51:46,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:51:46,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:51:46,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:51:46,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:51:46,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:51:46,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:51:46,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:51:46,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:51:46,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:51:46,097 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:51:46,097 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:51:46,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:51:46,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:51:46,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:51:46,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:51:46,357 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:51:46,358 INFO L432 ainManager$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 [2022-02-23 20:51:46,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa49f0c14/72b687a261d74df4aebf6ad4dd07f02a/FLAG8209c4b1b [2022-02-23 20:51:46,821 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:51:46,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2022-02-23 20:51:46,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa49f0c14/72b687a261d74df4aebf6ad4dd07f02a/FLAG8209c4b1b [2022-02-23 20:51:46,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa49f0c14/72b687a261d74df4aebf6ad4dd07f02a [2022-02-23 20:51:46,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:51:46,864 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:51:46,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:51:46,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:51:46,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:51:46,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:51:46" (1/1) ... [2022-02-23 20:51:46,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5877a07d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:46, skipping insertion in model container [2022-02-23 20:51:46,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:51:46" (1/1) ... [2022-02-23 20:51:46,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:51:46,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:51:47,200 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] [2022-02-23 20:51:47,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:51:47,286 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:51:47,340 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] [2022-02-23 20:51:47,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:51:47,402 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:51:47,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47 WrapperNode [2022-02-23 20:51:47,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:51:47,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:51:47,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:51:47,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:51:47,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:51:47,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:51:47,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:51:47,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:51:47,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (1/1) ... [2022-02-23 20:51:47,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:51:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:51:47,517 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) [2022-02-23 20:51:47,538 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 [2022-02-23 20:51:47,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:51:47,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:51:47,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:51:47,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 20:51:47,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:51:47,557 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:51:47,557 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:51:47,557 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:51:47,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:51:47,559 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 20:51:47,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:51:47,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:51:47,618 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:51:47,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:51:48,125 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:51:48,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:51:48,132 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-23 20:51:48,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:51:48 BoogieIcfgContainer [2022-02-23 20:51:48,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:51:48,134 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:51:48,134 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:51:48,135 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:51:48,138 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:51:48" (1/1) ... [2022-02-23 20:51:48,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:51:48 BasicIcfg [2022-02-23 20:51:48,194 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:51:48,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:51:48,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:51:48,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:51:48,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:51:46" (1/4) ... [2022-02-23 20:51:48,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdff9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:51:48, skipping insertion in model container [2022-02-23 20:51:48,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:51:47" (2/4) ... [2022-02-23 20:51:48,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdff9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:51:48, skipping insertion in model container [2022-02-23 20:51:48,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:51:48" (3/4) ... [2022-02-23 20:51:48,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdff9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:51:48, skipping insertion in model container [2022-02-23 20:51:48,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:51:48" (4/4) ... [2022-02-23 20:51:48,201 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+nlh-reducer.cqvasr [2022-02-23 20:51:48,206 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:51:48,206 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:51:48,258 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:51:48,262 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-02-23 20:51:48,262 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:51:48,283 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) [2022-02-23 20:51:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:48,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:48,295 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] [2022-02-23 20:51:48,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1525673560, now seen corresponding path program 1 times [2022-02-23 20:51:48,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:48,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113937481] [2022-02-23 20:51:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:48,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:48,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:48,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:48,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113937481] [2022-02-23 20:51:48,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113937481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:48,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:48,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 20:51:48,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273993324] [2022-02-23 20:51:48,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:48,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 20:51:48,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:48,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 20:51:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 20:51:48,643 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) [2022-02-23 20:51:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:49,480 INFO L93 Difference]: Finished difference Result 292 states and 562 transitions. [2022-02-23 20:51:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 20:51:49,488 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 [2022-02-23 20:51:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:49,498 INFO L225 Difference]: With dead ends: 292 [2022-02-23 20:51:49,498 INFO L226 Difference]: Without dead ends: 279 [2022-02-23 20:51:49,500 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 [2022-02-23 20:51:49,503 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:49,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 22 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 20:51:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-23 20:51:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 146. [2022-02-23 20:51:49,572 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) [2022-02-23 20:51:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 214 transitions. [2022-02-23 20:51:49,575 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 214 transitions. Word has length 143 [2022-02-23 20:51:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:49,578 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 214 transitions. [2022-02-23 20:51:49,579 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) [2022-02-23 20:51:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 214 transitions. [2022-02-23 20:51:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:49,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:49,589 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] [2022-02-23 20:51:49,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:51:49,589 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1525703351, now seen corresponding path program 1 times [2022-02-23 20:51:49,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:49,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531898753] [2022-02-23 20:51:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:49,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:49,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:49,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531898753] [2022-02-23 20:51:49,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531898753] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:49,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:49,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 20:51:49,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989102276] [2022-02-23 20:51:49,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:49,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 20:51:49,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 20:51:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 20:51:49,823 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) [2022-02-23 20:51:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:50,480 INFO L93 Difference]: Finished difference Result 414 states and 615 transitions. [2022-02-23 20:51:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 20:51:50,480 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 [2022-02-23 20:51:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:50,483 INFO L225 Difference]: With dead ends: 414 [2022-02-23 20:51:50,483 INFO L226 Difference]: Without dead ends: 411 [2022-02-23 20:51:50,484 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 [2022-02-23 20:51:50,485 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 472 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:50,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 21 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 20:51:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-23 20:51:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 150. [2022-02-23 20:51:50,505 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) [2022-02-23 20:51:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 220 transitions. [2022-02-23 20:51:50,506 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 220 transitions. Word has length 143 [2022-02-23 20:51:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:50,506 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 220 transitions. [2022-02-23 20:51:50,507 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) [2022-02-23 20:51:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 220 transitions. [2022-02-23 20:51:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:50,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:50,508 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] [2022-02-23 20:51:50,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:51:50,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1554332502, now seen corresponding path program 1 times [2022-02-23 20:51:50,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:50,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527703739] [2022-02-23 20:51:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:50,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:50,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:50,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527703739] [2022-02-23 20:51:50,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527703739] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:50,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:50,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:51:50,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346858629] [2022-02-23 20:51:50,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:50,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:51:50,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:51:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:51:50,635 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) [2022-02-23 20:51:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:51,752 INFO L93 Difference]: Finished difference Result 544 states and 810 transitions. [2022-02-23 20:51:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 20:51:51,752 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 [2022-02-23 20:51:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:51,756 INFO L225 Difference]: With dead ends: 544 [2022-02-23 20:51:51,756 INFO L226 Difference]: Without dead ends: 541 [2022-02-23 20:51:51,756 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 [2022-02-23 20:51:51,757 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 735 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:51,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 16 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 20:51:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-02-23 20:51:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 156. [2022-02-23 20:51:51,775 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) [2022-02-23 20:51:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 229 transitions. [2022-02-23 20:51:51,775 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 229 transitions. Word has length 143 [2022-02-23 20:51:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:51,776 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 229 transitions. [2022-02-23 20:51:51,776 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) [2022-02-23 20:51:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 229 transitions. [2022-02-23 20:51:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:51,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:51,778 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] [2022-02-23 20:51:51,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 20:51:51,778 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash -997824459, now seen corresponding path program 1 times [2022-02-23 20:51:51,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:51,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515578585] [2022-02-23 20:51:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:51,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:51,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515578585] [2022-02-23 20:51:51,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515578585] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:51,921 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:51,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 20:51:51,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064503547] [2022-02-23 20:51:51,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:51,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 20:51:51,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 20:51:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-23 20:51:51,922 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) [2022-02-23 20:51:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:53,252 INFO L93 Difference]: Finished difference Result 672 states and 1002 transitions. [2022-02-23 20:51:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:51:53,252 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 [2022-02-23 20:51:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:53,256 INFO L225 Difference]: With dead ends: 672 [2022-02-23 20:51:53,256 INFO L226 Difference]: Without dead ends: 669 [2022-02-23 20:51:53,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-23 20:51:53,258 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 861 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:53,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 21 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 20:51:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-23 20:51:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 164. [2022-02-23 20:51:53,283 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) [2022-02-23 20:51:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 241 transitions. [2022-02-23 20:51:53,284 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 241 transitions. Word has length 143 [2022-02-23 20:51:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:53,284 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 241 transitions. [2022-02-23 20:51:53,284 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) [2022-02-23 20:51:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 241 transitions. [2022-02-23 20:51:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:53,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:53,286 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] [2022-02-23 20:51:53,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 20:51:53,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1194337964, now seen corresponding path program 1 times [2022-02-23 20:51:53,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:53,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289862733] [2022-02-23 20:51:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:53,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:53,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289862733] [2022-02-23 20:51:53,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289862733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:53,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:53,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 20:51:53,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277133649] [2022-02-23 20:51:53,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:53,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 20:51:53,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 20:51:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 20:51:53,392 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) [2022-02-23 20:51:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:54,948 INFO L93 Difference]: Finished difference Result 798 states and 1191 transitions. [2022-02-23 20:51:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 20:51:54,949 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 [2022-02-23 20:51:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:54,954 INFO L225 Difference]: With dead ends: 798 [2022-02-23 20:51:54,954 INFO L226 Difference]: Without dead ends: 795 [2022-02-23 20:51:54,955 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 [2022-02-23 20:51:54,955 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 920 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 1708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1708 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:54,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 31 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1708 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-23 20:51:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-23 20:51:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 174. [2022-02-23 20:51:54,989 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) [2022-02-23 20:51:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 256 transitions. [2022-02-23 20:51:54,990 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 256 transitions. Word has length 143 [2022-02-23 20:51:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:54,990 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 256 transitions. [2022-02-23 20:51:54,991 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) [2022-02-23 20:51:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 256 transitions. [2022-02-23 20:51:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:54,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:54,992 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] [2022-02-23 20:51:54,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-23 20:51:54,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1065255245, now seen corresponding path program 1 times [2022-02-23 20:51:54,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:54,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628943102] [2022-02-23 20:51:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:55,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:55,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:55,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628943102] [2022-02-23 20:51:55,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628943102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:55,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:55,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-23 20:51:55,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423089181] [2022-02-23 20:51:55,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:55,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 20:51:55,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 20:51:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-23 20:51:55,076 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) [2022-02-23 20:51:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:56,995 INFO L93 Difference]: Finished difference Result 922 states and 1377 transitions. [2022-02-23 20:51:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 20:51:56,996 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 [2022-02-23 20:51:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:57,000 INFO L225 Difference]: With dead ends: 922 [2022-02-23 20:51:57,000 INFO L226 Difference]: Without dead ends: 919 [2022-02-23 20:51:57,000 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 [2022-02-23 20:51:57,001 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1567 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 2567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2567 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:57,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 16 Invalid, 3555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2567 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-23 20:51:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-23 20:51:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 186. [2022-02-23 20:51:57,029 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) [2022-02-23 20:51:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 274 transitions. [2022-02-23 20:51:57,030 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 274 transitions. Word has length 143 [2022-02-23 20:51:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:57,030 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 274 transitions. [2022-02-23 20:51:57,031 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) [2022-02-23 20:51:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 274 transitions. [2022-02-23 20:51:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:57,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:57,032 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] [2022-02-23 20:51:57,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-23 20:51:57,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1570813870, now seen corresponding path program 1 times [2022-02-23 20:51:57,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:57,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339652645] [2022-02-23 20:51:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:57,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:57,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:57,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339652645] [2022-02-23 20:51:57,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339652645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:57,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:57,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 20:51:57,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145724420] [2022-02-23 20:51:57,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:57,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 20:51:57,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 20:51:57,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:51:57,129 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) [2022-02-23 20:51:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:51:59,281 INFO L93 Difference]: Finished difference Result 1044 states and 1560 transitions. [2022-02-23 20:51:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 20:51:59,283 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 [2022-02-23 20:51:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:51:59,288 INFO L225 Difference]: With dead ends: 1044 [2022-02-23 20:51:59,288 INFO L226 Difference]: Without dead ends: 1041 [2022-02-23 20:51:59,288 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 [2022-02-23 20:51:59,289 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1619 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 3248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 4362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3248 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-23 20:51:59,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 21 Invalid, 4362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3248 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-23 20:51:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-23 20:51:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 200. [2022-02-23 20:51:59,320 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) [2022-02-23 20:51:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 295 transitions. [2022-02-23 20:51:59,321 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 295 transitions. Word has length 143 [2022-02-23 20:51:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:51:59,321 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 295 transitions. [2022-02-23 20:51:59,321 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) [2022-02-23 20:51:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 295 transitions. [2022-02-23 20:51:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:51:59,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:51:59,323 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] [2022-02-23 20:51:59,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 20:51:59,323 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:51:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:51:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2081348047, now seen corresponding path program 1 times [2022-02-23 20:51:59,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:51:59,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385992080] [2022-02-23 20:51:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:51:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:51:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:59,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:51:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:51:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:51:59,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:51:59,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385992080] [2022-02-23 20:51:59,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385992080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:51:59,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:51:59,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-23 20:51:59,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114526898] [2022-02-23 20:51:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:51:59,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 20:51:59,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:51:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 20:51:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-02-23 20:51:59,430 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) [2022-02-23 20:52:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:01,724 INFO L93 Difference]: Finished difference Result 1164 states and 1740 transitions. [2022-02-23 20:52:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 20:52:01,724 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 [2022-02-23 20:52:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:01,729 INFO L225 Difference]: With dead ends: 1164 [2022-02-23 20:52:01,729 INFO L226 Difference]: Without dead ends: 1161 [2022-02-23 20:52:01,730 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 [2022-02-23 20:52:01,730 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1673 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 3537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3537 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:01,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1673 Valid, 26 Invalid, 4775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3537 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-23 20:52:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-02-23 20:52:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 216. [2022-02-23 20:52:01,767 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) [2022-02-23 20:52:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2022-02-23 20:52:01,768 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 143 [2022-02-23 20:52:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:01,769 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2022-02-23 20:52:01,769 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) [2022-02-23 20:52:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2022-02-23 20:52:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:01,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:01,771 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] [2022-02-23 20:52:01,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-23 20:52:01,771 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1216546896, now seen corresponding path program 1 times [2022-02-23 20:52:01,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:01,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780591152] [2022-02-23 20:52:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:01,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:01,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780591152] [2022-02-23 20:52:01,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780591152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:01,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:01,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-23 20:52:01,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674930446] [2022-02-23 20:52:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:01,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 20:52:01,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 20:52:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:52:01,874 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) [2022-02-23 20:52:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:04,353 INFO L93 Difference]: Finished difference Result 1282 states and 1917 transitions. [2022-02-23 20:52:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 20:52:04,353 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 [2022-02-23 20:52:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:04,358 INFO L225 Difference]: With dead ends: 1282 [2022-02-23 20:52:04,358 INFO L226 Difference]: Without dead ends: 1279 [2022-02-23 20:52:04,359 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 [2022-02-23 20:52:04,360 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1981 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 4088 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 5442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4088 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:04,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1981 Valid, 21 Invalid, 5442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4088 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-23 20:52:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-02-23 20:52:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 234. [2022-02-23 20:52:04,402 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) [2022-02-23 20:52:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 346 transitions. [2022-02-23 20:52:04,403 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 346 transitions. Word has length 143 [2022-02-23 20:52:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:04,403 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 346 transitions. [2022-02-23 20:52:04,404 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) [2022-02-23 20:52:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 346 transitions. [2022-02-23 20:52:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:04,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:04,405 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] [2022-02-23 20:52:04,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-23 20:52:04,406 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash 807722671, now seen corresponding path program 1 times [2022-02-23 20:52:04,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:04,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905404318] [2022-02-23 20:52:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:04,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:04,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:04,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:04,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905404318] [2022-02-23 20:52:04,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905404318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:04,526 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:04,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-23 20:52:04,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620389179] [2022-02-23 20:52:04,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:04,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 20:52:04,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 20:52:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-02-23 20:52:04,527 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) [2022-02-23 20:52:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:07,705 INFO L93 Difference]: Finished difference Result 1398 states and 2091 transitions. [2022-02-23 20:52:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 20:52:07,706 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 [2022-02-23 20:52:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:07,711 INFO L225 Difference]: With dead ends: 1398 [2022-02-23 20:52:07,711 INFO L226 Difference]: Without dead ends: 1395 [2022-02-23 20:52:07,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-02-23 20:52:07,712 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2735 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 6331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2735 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6331 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:07,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2735 Valid, 16 Invalid, 7799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6331 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-23 20:52:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-02-23 20:52:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 254. [2022-02-23 20:52:07,765 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) [2022-02-23 20:52:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 376 transitions. [2022-02-23 20:52:07,766 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 376 transitions. Word has length 143 [2022-02-23 20:52:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:07,767 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 376 transitions. [2022-02-23 20:52:07,767 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) [2022-02-23 20:52:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 376 transitions. [2022-02-23 20:52:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:07,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:07,768 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] [2022-02-23 20:52:07,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-23 20:52:07,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1230333618, now seen corresponding path program 1 times [2022-02-23 20:52:07,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:07,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641039015] [2022-02-23 20:52:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:07,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:07,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:07,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:07,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641039015] [2022-02-23 20:52:07,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641039015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:07,890 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:07,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-23 20:52:07,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689458038] [2022-02-23 20:52:07,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:07,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 20:52:07,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:07,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 20:52:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-02-23 20:52:07,891 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) [2022-02-23 20:52:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:11,142 INFO L93 Difference]: Finished difference Result 1512 states and 2262 transitions. [2022-02-23 20:52:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 20:52:11,142 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 [2022-02-23 20:52:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:11,148 INFO L225 Difference]: With dead ends: 1512 [2022-02-23 20:52:11,148 INFO L226 Difference]: Without dead ends: 1509 [2022-02-23 20:52:11,149 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 [2022-02-23 20:52:11,150 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2700 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 5965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2700 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 7551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5965 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:11,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2700 Valid, 21 Invalid, 7551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5965 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-23 20:52:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-02-23 20:52:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 276. [2022-02-23 20:52:11,220 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) [2022-02-23 20:52:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 409 transitions. [2022-02-23 20:52:11,221 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 409 transitions. Word has length 143 [2022-02-23 20:52:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:11,222 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 409 transitions. [2022-02-23 20:52:11,222 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) [2022-02-23 20:52:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 409 transitions. [2022-02-23 20:52:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:11,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:11,223 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] [2022-02-23 20:52:11,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-23 20:52:11,224 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:11,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1297340371, now seen corresponding path program 1 times [2022-02-23 20:52:11,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:11,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127551787] [2022-02-23 20:52:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:11,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:11,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:11,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127551787] [2022-02-23 20:52:11,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127551787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:11,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:11,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-23 20:52:11,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322770238] [2022-02-23 20:52:11,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:11,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 20:52:11,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 20:52:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-02-23 20:52:11,374 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) [2022-02-23 20:52:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:14,926 INFO L93 Difference]: Finished difference Result 1624 states and 2430 transitions. [2022-02-23 20:52:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 20:52:14,926 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 [2022-02-23 20:52:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:14,931 INFO L225 Difference]: With dead ends: 1624 [2022-02-23 20:52:14,931 INFO L226 Difference]: Without dead ends: 1621 [2022-02-23 20:52:14,932 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 [2022-02-23 20:52:14,933 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3308 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 6139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3308 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6139 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:14,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3308 Valid, 16 Invalid, 7835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6139 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-23 20:52:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-02-23 20:52:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 300. [2022-02-23 20:52:15,016 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) [2022-02-23 20:52:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 445 transitions. [2022-02-23 20:52:15,017 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 445 transitions. Word has length 143 [2022-02-23 20:52:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:15,017 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 445 transitions. [2022-02-23 20:52:15,018 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) [2022-02-23 20:52:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 445 transitions. [2022-02-23 20:52:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:15,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:15,019 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] [2022-02-23 20:52:15,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-23 20:52:15,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1266320564, now seen corresponding path program 1 times [2022-02-23 20:52:15,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:15,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76732632] [2022-02-23 20:52:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:15,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:15,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:15,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76732632] [2022-02-23 20:52:15,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76732632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:15,163 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:15,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-23 20:52:15,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979753629] [2022-02-23 20:52:15,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:15,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 20:52:15,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 20:52:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-02-23 20:52:15,164 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) [2022-02-23 20:52:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:18,442 INFO L93 Difference]: Finished difference Result 1734 states and 2595 transitions. [2022-02-23 20:52:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 20:52:18,442 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 [2022-02-23 20:52:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:18,447 INFO L225 Difference]: With dead ends: 1734 [2022-02-23 20:52:18,447 INFO L226 Difference]: Without dead ends: 1731 [2022-02-23 20:52:18,448 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 [2022-02-23 20:52:18,448 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2786 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 4244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 6066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4244 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:18,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 41 Invalid, 6066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4244 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-23 20:52:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-02-23 20:52:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 326. [2022-02-23 20:52:18,517 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) [2022-02-23 20:52:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 484 transitions. [2022-02-23 20:52:18,518 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 484 transitions. Word has length 143 [2022-02-23 20:52:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:18,519 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 484 transitions. [2022-02-23 20:52:18,519 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) [2022-02-23 20:52:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 484 transitions. [2022-02-23 20:52:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:18,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:18,521 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] [2022-02-23 20:52:18,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-23 20:52:18,521 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1521057109, now seen corresponding path program 1 times [2022-02-23 20:52:18,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:18,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121901993] [2022-02-23 20:52:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:18,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:18,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121901993] [2022-02-23 20:52:18,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121901993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:18,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:18,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-23 20:52:18,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284644414] [2022-02-23 20:52:18,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:18,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 20:52:18,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 20:52:18,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-02-23 20:52:18,661 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) [2022-02-23 20:52:23,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:23,379 INFO L93 Difference]: Finished difference Result 1842 states and 2757 transitions. [2022-02-23 20:52:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 20:52:23,379 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 [2022-02-23 20:52:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:23,384 INFO L225 Difference]: With dead ends: 1842 [2022-02-23 20:52:23,384 INFO L226 Difference]: Without dead ends: 1839 [2022-02-23 20:52:23,385 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 [2022-02-23 20:52:23,385 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3608 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 9416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3608 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 11338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9416 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:23,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3608 Valid, 26 Invalid, 11338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9416 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-23 20:52:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-02-23 20:52:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 354. [2022-02-23 20:52:23,473 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) [2022-02-23 20:52:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 526 transitions. [2022-02-23 20:52:23,473 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 526 transitions. Word has length 143 [2022-02-23 20:52:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:23,474 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 526 transitions. [2022-02-23 20:52:23,474 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) [2022-02-23 20:52:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 526 transitions. [2022-02-23 20:52:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:23,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:23,475 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] [2022-02-23 20:52:23,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-23 20:52:23,475 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1509740982, now seen corresponding path program 1 times [2022-02-23 20:52:23,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:23,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417274530] [2022-02-23 20:52:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:23,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:23,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:23,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:23,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417274530] [2022-02-23 20:52:23,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417274530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:23,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:23,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-23 20:52:23,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482669356] [2022-02-23 20:52:23,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:23,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 20:52:23,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 20:52:23,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-23 20:52:23,639 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) [2022-02-23 20:52:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:28,130 INFO L93 Difference]: Finished difference Result 1948 states and 2916 transitions. [2022-02-23 20:52:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-23 20:52:28,131 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 [2022-02-23 20:52:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:28,135 INFO L225 Difference]: With dead ends: 1948 [2022-02-23 20:52:28,136 INFO L226 Difference]: Without dead ends: 1945 [2022-02-23 20:52:28,136 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 [2022-02-23 20:52:28,137 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2941 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 7310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2941 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7310 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:28,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2941 Valid, 36 Invalid, 9345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7310 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-23 20:52:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-02-23 20:52:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 384. [2022-02-23 20:52:28,246 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) [2022-02-23 20:52:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 571 transitions. [2022-02-23 20:52:28,247 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 571 transitions. Word has length 143 [2022-02-23 20:52:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:28,248 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 571 transitions. [2022-02-23 20:52:28,248 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) [2022-02-23 20:52:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 571 transitions. [2022-02-23 20:52:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:28,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:28,249 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] [2022-02-23 20:52:28,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-23 20:52:28,250 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash 775122473, now seen corresponding path program 1 times [2022-02-23 20:52:28,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:28,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981605233] [2022-02-23 20:52:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:28,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:28,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:28,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981605233] [2022-02-23 20:52:28,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981605233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:28,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:28,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-23 20:52:28,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69078287] [2022-02-23 20:52:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:28,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 20:52:28,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:28,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 20:52:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-02-23 20:52:28,439 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) [2022-02-23 20:52:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:33,183 INFO L93 Difference]: Finished difference Result 2052 states and 3072 transitions. [2022-02-23 20:52:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 20:52:33,184 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 [2022-02-23 20:52:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:33,188 INFO L225 Difference]: With dead ends: 2052 [2022-02-23 20:52:33,188 INFO L226 Difference]: Without dead ends: 2049 [2022-02-23 20:52:33,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 20:52:33,190 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3636 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 7357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 9488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7357 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:33,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 21 Invalid, 9488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7357 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-23 20:52:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-02-23 20:52:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 416. [2022-02-23 20:52:33,293 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) [2022-02-23 20:52:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 619 transitions. [2022-02-23 20:52:33,295 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 619 transitions. Word has length 143 [2022-02-23 20:52:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:33,295 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 619 transitions. [2022-02-23 20:52:33,295 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) [2022-02-23 20:52:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 619 transitions. [2022-02-23 20:52:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:33,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:33,297 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] [2022-02-23 20:52:33,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-23 20:52:33,297 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1800614472, now seen corresponding path program 1 times [2022-02-23 20:52:33,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:33,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416246462] [2022-02-23 20:52:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:33,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:34,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:34,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416246462] [2022-02-23 20:52:34,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416246462] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:34,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:34,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-23 20:52:34,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434897270] [2022-02-23 20:52:34,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:34,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 20:52:34,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 20:52:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 20:52:34,341 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) [2022-02-23 20:52:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:35,869 INFO L93 Difference]: Finished difference Result 649 states and 967 transitions. [2022-02-23 20:52:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-23 20:52:35,869 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 [2022-02-23 20:52:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:35,870 INFO L225 Difference]: With dead ends: 649 [2022-02-23 20:52:35,870 INFO L226 Difference]: Without dead ends: 241 [2022-02-23 20:52:35,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3984, Invalid=6936, Unknown=0, NotChecked=0, Total=10920 [2022-02-23 20:52:35,877 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 388 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:35,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 40 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 20:52:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-23 20:52:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-02-23 20:52:35,979 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) [2022-02-23 20:52:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 290 transitions. [2022-02-23 20:52:35,979 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 290 transitions. Word has length 143 [2022-02-23 20:52:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:35,979 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 290 transitions. [2022-02-23 20:52:35,980 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) [2022-02-23 20:52:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 290 transitions. [2022-02-23 20:52:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 20:52:35,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:35,980 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] [2022-02-23 20:52:35,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-23 20:52:35,981 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -544052569, now seen corresponding path program 1 times [2022-02-23 20:52:35,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:35,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717625501] [2022-02-23 20:52:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:35,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:37,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:37,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717625501] [2022-02-23 20:52:37,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717625501] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:37,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:37,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-23 20:52:37,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965772665] [2022-02-23 20:52:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:37,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-23 20:52:37,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-23 20:52:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-02-23 20:52:37,616 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) [2022-02-23 20:52:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:39,923 INFO L93 Difference]: Finished difference Result 282 states and 332 transitions. [2022-02-23 20:52:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-23 20:52:39,924 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 [2022-02-23 20:52:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:39,925 INFO L225 Difference]: With dead ends: 282 [2022-02-23 20:52:39,925 INFO L226 Difference]: Without dead ends: 147 [2022-02-23 20:52:39,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-02-23 20:52:39,930 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 275 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:39,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 51 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 20:52:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-23 20:52:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-02-23 20:52:39,983 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) [2022-02-23 20:52:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-02-23 20:52:39,983 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2022-02-23 20:52:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:39,984 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-02-23 20:52:39,984 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) [2022-02-23 20:52:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-02-23 20:52:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-23 20:52:39,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:39,985 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] [2022-02-23 20:52:39,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-23 20:52:39,985 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:39,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1150564772, now seen corresponding path program 1 times [2022-02-23 20:52:39,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:39,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914133016] [2022-02-23 20:52:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:41,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:41,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:41,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914133016] [2022-02-23 20:52:41,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914133016] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:52:41,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789526087] [2022-02-23 20:52:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:41,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:52:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:52:41,568 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) [2022-02-23 20:52:41,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 20:52:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 70 conjunts are in the unsatisfiable core [2022-02-23 20:52:41,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:52:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:42,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:52:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:44,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789526087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:52:44,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:52:44,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 104 [2022-02-23 20:52:44,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352790713] [2022-02-23 20:52:44,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:52:44,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-23 20:52:44,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-23 20:52:44,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-02-23 20:52:44,171 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) [2022-02-23 20:52:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:48,577 INFO L93 Difference]: Finished difference Result 213 states and 244 transitions. [2022-02-23 20:52:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-23 20:52:48,578 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 [2022-02-23 20:52:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:48,579 INFO L225 Difference]: With dead ends: 213 [2022-02-23 20:52:48,579 INFO L226 Difference]: Without dead ends: 210 [2022-02-23 20:52:48,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5780 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-02-23 20:52:48,588 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 534 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:48,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 51 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 20:52:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-23 20:52:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-23 20:52:48,657 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) [2022-02-23 20:52:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2022-02-23 20:52:48,658 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 145 [2022-02-23 20:52:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:48,658 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2022-02-23 20:52:48,659 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) [2022-02-23 20:52:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2022-02-23 20:52:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-23 20:52:48,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:48,660 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] [2022-02-23 20:52:48,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 20:52:48,883 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 [2022-02-23 20:52:48,883 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash 163308868, now seen corresponding path program 2 times [2022-02-23 20:52:48,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:48,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426751650] [2022-02-23 20:52:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:50,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:50,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:50,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426751650] [2022-02-23 20:52:50,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426751650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:52:50,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850857936] [2022-02-23 20:52:50,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:52:50,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:52:50,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:52:50,312 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) [2022-02-23 20:52:50,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 20:52:50,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:52:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:52:50,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 105 conjunts are in the unsatisfiable core [2022-02-23 20:52:50,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:52:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:51,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:52:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:52,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850857936] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:52:52,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:52:52,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2022-02-23 20:52:52,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719533874] [2022-02-23 20:52:52,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:52:52,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-23 20:52:52,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-23 20:52:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 20:52:52,328 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) [2022-02-23 20:52:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:56,918 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2022-02-23 20:52:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-23 20:52:56,919 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 [2022-02-23 20:52:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:56,920 INFO L225 Difference]: With dead ends: 216 [2022-02-23 20:52:56,920 INFO L226 Difference]: Without dead ends: 213 [2022-02-23 20:52:56,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 414 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=321, Invalid=11235, Unknown=0, NotChecked=0, Total=11556 [2022-02-23 20:52:56,922 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 160 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 10563 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 10615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 10563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:56,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 421 Invalid, 10615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 10563 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-23 20:52:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-23 20:52:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-02-23 20:52:57,007 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) [2022-02-23 20:52:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2022-02-23 20:52:57,008 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2022-02-23 20:52:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:57,008 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2022-02-23 20:52:57,008 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) [2022-02-23 20:52:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2022-02-23 20:52:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-02-23 20:52:57,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:52:57,009 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] [2022-02-23 20:52:57,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 20:52:57,227 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 [2022-02-23 20:52:57,228 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:52:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:52:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1974894335, now seen corresponding path program 3 times [2022-02-23 20:52:57,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:52:57,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621148445] [2022-02-23 20:52:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:52:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:52:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:58,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:52:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:52:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:52:58,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:52:58,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621148445] [2022-02-23 20:52:58,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621148445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:52:58,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:52:58,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-23 20:52:58,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766960095] [2022-02-23 20:52:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:52:58,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-23 20:52:58,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:52:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-23 20:52:58,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-02-23 20:52:58,166 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) [2022-02-23 20:52:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:52:59,309 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2022-02-23 20:52:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-23 20:52:59,309 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 [2022-02-23 20:52:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:52:59,310 INFO L225 Difference]: With dead ends: 212 [2022-02-23 20:52:59,310 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 20:52:59,311 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 [2022-02-23 20:52:59,311 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 153 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 20:52:59,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 130 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 20:52:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 20:52:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 20:52:59,312 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) [2022-02-23 20:52:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 20:52:59,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-02-23 20:52:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:52:59,312 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 20:52:59,312 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) [2022-02-23 20:52:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 20:52:59,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 20:52:59,314 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 20:52:59,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-23 20:52:59,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.