/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:48:47,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:48:47,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:48:47,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:48:47,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:48:47,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:48:47,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:48:47,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:48:47,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:48:47,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:48:47,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:48:47,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:48:47,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:48:47,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:48:47,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:48:47,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:48:47,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:48:47,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:48:47,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:48:47,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:48:47,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:48:47,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:48:47,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:48:48,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:48:48,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 01:48:48,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:48:48,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:48:48,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:48:48,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 01:48:48,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:48:48,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:48:48,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:48:48,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:48:48,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:48:48,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:48:48,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:48:48,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:48:48,037 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:48:48,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:48:48,037 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:48:48,038 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:48:48,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:48:48,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:48:48,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:48:48,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:48:48,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:48:48,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:48:48,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:48:48,041 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:48:48,041 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:48:48,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:48:48,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:48:48,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:48:48,295 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:48:48,296 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:48:48,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:48:49,423 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:48:49,647 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:48:49,648 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:48:49,666 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a958f78bd/5700f1184a5a40a4b829b419e6822791/FLAGbdcc862a7 [2023-03-31 01:48:49,684 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a958f78bd/5700f1184a5a40a4b829b419e6822791 [2023-03-31 01:48:49,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:48:49,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:48:49,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:48:49,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:48:49,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:48:49,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:48:49" (1/1) ... [2023-03-31 01:48:49,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ab144f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:49, skipping insertion in model container [2023-03-31 01:48:49,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:48:49" (1/1) ... [2023-03-31 01:48:49,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:48:49,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:48:49,909 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-03-31 01:48:49,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:48:49,952 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:48:49,981 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-03-31 01:48:49,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:48:50,012 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:48:50,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50 WrapperNode [2023-03-31 01:48:50,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:48:50,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:48:50,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:48:50,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:48:50,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:48:50,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:48:50,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:48:50,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:48:50,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (1/1) ... [2023-03-31 01:48:50,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:48:50,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:48:50,092 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) [2023-03-31 01:48:50,094 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 [2023-03-31 01:48:50,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:48:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:48:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:48:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:48:50,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:48:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:48:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:48:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:48:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:48:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:48:50,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:48:50,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:48:50,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:48:50,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:48:50,283 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:48:50,285 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:48:50,765 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:48:50,771 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:48:50,772 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:48:50,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:48:50 BoogieIcfgContainer [2023-03-31 01:48:50,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:48:50,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:48:50,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:48:50,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:48:50,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:48:49" (1/3) ... [2023-03-31 01:48:50,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fc0407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:48:50, skipping insertion in model container [2023-03-31 01:48:50,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:48:50" (2/3) ... [2023-03-31 01:48:50,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fc0407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:48:50, skipping insertion in model container [2023-03-31 01:48:50,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:48:50" (3/3) ... [2023-03-31 01:48:50,781 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:48:50,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:48:50,798 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:48:50,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:48:50,848 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@18e90487, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:48:50,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:48:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 106 states have (on average 1.679245283018868) internal successors, (178), 107 states have internal predecessors, (178), 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) [2023-03-31 01:48:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 01:48:50,865 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:48:50,866 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:48:50,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:48:50,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:48:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1624692353, now seen corresponding path program 1 times [2023-03-31 01:48:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:48:50,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781536698] [2023-03-31 01:48:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:48:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:48:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:51,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:48:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:48:51,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:48:51,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781536698] [2023-03-31 01:48:51,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781536698] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:48:51,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:48:51,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:48:51,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761589154] [2023-03-31 01:48:51,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:48:51,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:48:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:48:51,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:48:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:48:51,568 INFO L87 Difference]: Start difference. First operand has 112 states, 106 states have (on average 1.679245283018868) internal successors, (178), 107 states have internal predecessors, (178), 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 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-03-31 01:48:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:48:52,224 INFO L93 Difference]: Finished difference Result 258 states and 408 transitions. [2023-03-31 01:48:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:48:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-03-31 01:48:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:48:52,240 INFO L225 Difference]: With dead ends: 258 [2023-03-31 01:48:52,241 INFO L226 Difference]: Without dead ends: 169 [2023-03-31 01:48:52,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:48:52,249 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 127 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:48:52,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 378 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:48:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-03-31 01:48:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2023-03-31 01:48:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.4969325153374233) internal successors, (244), 163 states have internal predecessors, (244), 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) [2023-03-31 01:48:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 247 transitions. [2023-03-31 01:48:52,318 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 247 transitions. Word has length 52 [2023-03-31 01:48:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:48:52,318 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 247 transitions. [2023-03-31 01:48:52,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-03-31 01:48:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 247 transitions. [2023-03-31 01:48:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-31 01:48:52,320 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:48:52,320 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:48:52,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:48:52,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:48:52,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:48:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1038664016, now seen corresponding path program 1 times [2023-03-31 01:48:52,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:48:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783496665] [2023-03-31 01:48:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:48:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:48:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:48:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:48:52,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:48:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783496665] [2023-03-31 01:48:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783496665] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:48:52,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:48:52,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:48:52,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600360109] [2023-03-31 01:48:52,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:48:52,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:48:52,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:48:52,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:48:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:48:52,565 INFO L87 Difference]: Start difference. First operand 167 states and 247 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-03-31 01:48:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:48:53,062 INFO L93 Difference]: Finished difference Result 407 states and 627 transitions. [2023-03-31 01:48:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:48:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-03-31 01:48:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:48:53,065 INFO L225 Difference]: With dead ends: 407 [2023-03-31 01:48:53,065 INFO L226 Difference]: Without dead ends: 271 [2023-03-31 01:48:53,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:48:53,068 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 104 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:48:53,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 317 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:48:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-03-31 01:48:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2023-03-31 01:48:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.528301886792453) internal successors, (405), 265 states have internal predecessors, (405), 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) [2023-03-31 01:48:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 408 transitions. [2023-03-31 01:48:53,101 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 408 transitions. Word has length 53 [2023-03-31 01:48:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:48:53,102 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 408 transitions. [2023-03-31 01:48:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2023-03-31 01:48:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 408 transitions. [2023-03-31 01:48:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-31 01:48:53,103 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:48:53,104 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:48:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:48:53,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:48:53,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:48:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -672333922, now seen corresponding path program 1 times [2023-03-31 01:48:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:48:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965469659] [2023-03-31 01:48:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:48:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:48:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:48:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:48:53,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:48:53,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965469659] [2023-03-31 01:48:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965469659] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:48:53,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:48:53,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:48:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702784898] [2023-03-31 01:48:53,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:48:53,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:48:53,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:48:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:48:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:48:53,286 INFO L87 Difference]: Start difference. First operand 269 states and 408 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2023-03-31 01:48:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:48:53,727 INFO L93 Difference]: Finished difference Result 681 states and 1058 transitions. [2023-03-31 01:48:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:48:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 54 [2023-03-31 01:48:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:48:53,730 INFO L225 Difference]: With dead ends: 681 [2023-03-31 01:48:53,730 INFO L226 Difference]: Without dead ends: 443 [2023-03-31 01:48:53,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:48:53,733 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 99 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:48:53,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 302 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:48:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-03-31 01:48:53,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2023-03-31 01:48:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 437 states have (on average 1.540045766590389) internal successors, (673), 437 states have internal predecessors, (673), 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) [2023-03-31 01:48:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 676 transitions. [2023-03-31 01:48:53,784 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 676 transitions. Word has length 54 [2023-03-31 01:48:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:48:53,784 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 676 transitions. [2023-03-31 01:48:53,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2023-03-31 01:48:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 676 transitions. [2023-03-31 01:48:53,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-31 01:48:53,786 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:48:53,786 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:48:53,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:48:53,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:48:53,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:48:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1284336089, now seen corresponding path program 1 times [2023-03-31 01:48:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:48:53,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966266178] [2023-03-31 01:48:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:48:53,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:48:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:54,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:48:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:48:54,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:48:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966266178] [2023-03-31 01:48:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966266178] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:48:54,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:48:54,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 01:48:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868161638] [2023-03-31 01:48:54,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:48:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 01:48:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:48:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 01:48:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:48:54,027 INFO L87 Difference]: Start difference. First operand 441 states and 676 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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) [2023-03-31 01:48:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:48:54,691 INFO L93 Difference]: Finished difference Result 2491 states and 3901 transitions. [2023-03-31 01:48:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 01:48:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 55 [2023-03-31 01:48:54,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:48:54,705 INFO L225 Difference]: With dead ends: 2491 [2023-03-31 01:48:54,705 INFO L226 Difference]: Without dead ends: 2081 [2023-03-31 01:48:54,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-03-31 01:48:54,717 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 874 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:48:54,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 1250 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:48:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2023-03-31 01:48:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 849. [2023-03-31 01:48:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 845 states have (on average 1.5396449704142012) internal successors, (1301), 845 states have internal predecessors, (1301), 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) [2023-03-31 01:48:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1304 transitions. [2023-03-31 01:48:54,821 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1304 transitions. Word has length 55 [2023-03-31 01:48:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:48:54,821 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1304 transitions. [2023-03-31 01:48:54,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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) [2023-03-31 01:48:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1304 transitions. [2023-03-31 01:48:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-31 01:48:54,823 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:48:54,823 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:48:54,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:48:54,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:48:54,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:48:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1141180347, now seen corresponding path program 1 times [2023-03-31 01:48:54,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:48:54,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598095607] [2023-03-31 01:48:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:48:54,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:48:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:55,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:48:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:48:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:48:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598095607] [2023-03-31 01:48:55,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598095607] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:48:55,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:48:55,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 01:48:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450115917] [2023-03-31 01:48:55,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:48:55,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 01:48:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:48:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 01:48:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:48:55,075 INFO L87 Difference]: Start difference. First operand 849 states and 1304 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 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) [2023-03-31 01:48:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:48:56,089 INFO L93 Difference]: Finished difference Result 3713 states and 5724 transitions. [2023-03-31 01:48:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:48:56,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 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 56 [2023-03-31 01:48:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:48:56,102 INFO L225 Difference]: With dead ends: 3713 [2023-03-31 01:48:56,102 INFO L226 Difference]: Without dead ends: 2895 [2023-03-31 01:48:56,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:48:56,108 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 445 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:48:56,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 662 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:48:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2023-03-31 01:48:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2889. [2023-03-31 01:48:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2885 states have (on average 1.5351819757365686) internal successors, (4429), 2885 states have internal predecessors, (4429), 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) [2023-03-31 01:48:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4432 transitions. [2023-03-31 01:48:56,549 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4432 transitions. Word has length 56 [2023-03-31 01:48:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:48:56,549 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4432 transitions. [2023-03-31 01:48:56,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 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) [2023-03-31 01:48:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4432 transitions. [2023-03-31 01:48:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 01:48:56,550 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:48:56,550 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:48:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:48:56,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:48:56,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:48:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1676322199, now seen corresponding path program 1 times [2023-03-31 01:48:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:48:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989753039] [2023-03-31 01:48:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:48:56,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:48:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:48:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:48:56,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:48:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989753039] [2023-03-31 01:48:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989753039] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:48:56,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:48:56,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:48:56,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108510302] [2023-03-31 01:48:56,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:48:56,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:48:56,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:48:56,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:48:56,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:48:56,827 INFO L87 Difference]: Start difference. First operand 2889 states and 4432 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-03-31 01:48:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:48:57,936 INFO L93 Difference]: Finished difference Result 5875 states and 8961 transitions. [2023-03-31 01:48:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:48:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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 58 [2023-03-31 01:48:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:48:57,960 INFO L225 Difference]: With dead ends: 5875 [2023-03-31 01:48:57,960 INFO L226 Difference]: Without dead ends: 5873 [2023-03-31 01:48:57,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:48:57,964 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 232 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:48:57,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 766 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:48:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2023-03-31 01:48:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 3017. [2023-03-31 01:48:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3013 states have (on average 1.5124460670428144) internal successors, (4557), 3013 states have internal predecessors, (4557), 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) [2023-03-31 01:48:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4560 transitions. [2023-03-31 01:48:58,413 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4560 transitions. Word has length 58 [2023-03-31 01:48:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:48:58,414 INFO L495 AbstractCegarLoop]: Abstraction has 3017 states and 4560 transitions. [2023-03-31 01:48:58,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2023-03-31 01:48:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4560 transitions. [2023-03-31 01:48:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 01:48:58,416 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:48:58,417 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:48:58,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:48:58,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:48:58,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:48:58,425 INFO L85 PathProgramCache]: Analyzing trace with hash -416760870, now seen corresponding path program 1 times [2023-03-31 01:48:58,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:48:58,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224765059] [2023-03-31 01:48:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:48:58,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:48:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:58,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:48:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:48:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:48:58,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:48:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224765059] [2023-03-31 01:48:58,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224765059] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:48:58,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:48:58,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:48:58,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907789918] [2023-03-31 01:48:58,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:48:58,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:48:58,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:48:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:48:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:48:58,614 INFO L87 Difference]: Start difference. First operand 3017 states and 4560 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-03-31 01:48:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:48:59,702 INFO L93 Difference]: Finished difference Result 8237 states and 12398 transitions. [2023-03-31 01:48:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:48:59,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-03-31 01:48:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:48:59,721 INFO L225 Difference]: With dead ends: 8237 [2023-03-31 01:48:59,721 INFO L226 Difference]: Without dead ends: 5251 [2023-03-31 01:48:59,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:48:59,727 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 88 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:48:59,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 270 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:48:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2023-03-31 01:49:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 5193. [2023-03-31 01:49:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5193 states, 5189 states have (on average 1.4833301214106764) internal successors, (7697), 5189 states have internal predecessors, (7697), 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) [2023-03-31 01:49:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5193 states to 5193 states and 7700 transitions. [2023-03-31 01:49:00,523 INFO L78 Accepts]: Start accepts. Automaton has 5193 states and 7700 transitions. Word has length 59 [2023-03-31 01:49:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:00,524 INFO L495 AbstractCegarLoop]: Abstraction has 5193 states and 7700 transitions. [2023-03-31 01:49:00,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-03-31 01:49:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5193 states and 7700 transitions. [2023-03-31 01:49:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 01:49:00,526 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:00,526 INFO L195 NwaCegarLoop]: 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] [2023-03-31 01:49:00,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:49:00,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:00,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash -185023146, now seen corresponding path program 1 times [2023-03-31 01:49:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:00,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272811943] [2023-03-31 01:49:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:00,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:00,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:00,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272811943] [2023-03-31 01:49:00,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272811943] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:00,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:00,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:49:00,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892536856] [2023-03-31 01:49:00,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:00,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:49:00,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:00,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:49:00,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:49:00,702 INFO L87 Difference]: Start difference. First operand 5193 states and 7700 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-03-31 01:49:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:02,152 INFO L93 Difference]: Finished difference Result 10336 states and 15418 transitions. [2023-03-31 01:49:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:49:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-03-31 01:49:02,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:02,179 INFO L225 Difference]: With dead ends: 10336 [2023-03-31 01:49:02,180 INFO L226 Difference]: Without dead ends: 7349 [2023-03-31 01:49:02,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:49:02,188 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 110 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:02,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 362 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:49:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2023-03-31 01:49:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 7347. [2023-03-31 01:49:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7347 states, 7343 states have (on average 1.4733760043578918) internal successors, (10819), 7343 states have internal predecessors, (10819), 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) [2023-03-31 01:49:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7347 states to 7347 states and 10822 transitions. [2023-03-31 01:49:03,210 INFO L78 Accepts]: Start accepts. Automaton has 7347 states and 10822 transitions. Word has length 59 [2023-03-31 01:49:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:03,210 INFO L495 AbstractCegarLoop]: Abstraction has 7347 states and 10822 transitions. [2023-03-31 01:49:03,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-03-31 01:49:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 7347 states and 10822 transitions. [2023-03-31 01:49:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 01:49:03,215 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:03,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:03,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:49:03,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:03,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1773934648, now seen corresponding path program 1 times [2023-03-31 01:49:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:03,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15861375] [2023-03-31 01:49:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:03,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 01:49:03,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15861375] [2023-03-31 01:49:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15861375] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:03,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:03,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 01:49:03,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339609218] [2023-03-31 01:49:03,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:03,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 01:49:03,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 01:49:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:49:03,460 INFO L87 Difference]: Start difference. First operand 7347 states and 10822 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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) [2023-03-31 01:49:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:05,396 INFO L93 Difference]: Finished difference Result 15301 states and 22763 transitions. [2023-03-31 01:49:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 01:49:05,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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 81 [2023-03-31 01:49:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:05,429 INFO L225 Difference]: With dead ends: 15301 [2023-03-31 01:49:05,429 INFO L226 Difference]: Without dead ends: 12359 [2023-03-31 01:49:05,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-03-31 01:49:05,441 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 696 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:05,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 987 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:49:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12359 states. [2023-03-31 01:49:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12359 to 9939. [2023-03-31 01:49:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9939 states, 9935 states have (on average 1.4738802214393558) internal successors, (14643), 9935 states have internal predecessors, (14643), 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) [2023-03-31 01:49:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9939 states to 9939 states and 14646 transitions. [2023-03-31 01:49:06,720 INFO L78 Accepts]: Start accepts. Automaton has 9939 states and 14646 transitions. Word has length 81 [2023-03-31 01:49:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:06,720 INFO L495 AbstractCegarLoop]: Abstraction has 9939 states and 14646 transitions. [2023-03-31 01:49:06,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 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) [2023-03-31 01:49:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9939 states and 14646 transitions. [2023-03-31 01:49:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 01:49:06,725 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:06,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:49:06,725 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:06,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1042581799, now seen corresponding path program 1 times [2023-03-31 01:49:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:06,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93549541] [2023-03-31 01:49:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:06,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:06,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:06,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:06,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93549541] [2023-03-31 01:49:06,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93549541] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:06,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:06,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:49:06,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042776244] [2023-03-31 01:49:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:06,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:49:06,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:49:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:49:06,877 INFO L87 Difference]: Start difference. First operand 9939 states and 14646 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 01:49:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:08,793 INFO L93 Difference]: Finished difference Result 20153 states and 29662 transitions. [2023-03-31 01:49:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:49:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 81 [2023-03-31 01:49:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:08,825 INFO L225 Difference]: With dead ends: 20153 [2023-03-31 01:49:08,825 INFO L226 Difference]: Without dead ends: 14119 [2023-03-31 01:49:08,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:49:08,841 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 89 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:08,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 318 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:49:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14119 states. [2023-03-31 01:49:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14119 to 13129. [2023-03-31 01:49:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13129 states, 13125 states have (on average 1.4568380952380953) internal successors, (19121), 13125 states have internal predecessors, (19121), 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) [2023-03-31 01:49:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13129 states to 13129 states and 19124 transitions. [2023-03-31 01:49:10,566 INFO L78 Accepts]: Start accepts. Automaton has 13129 states and 19124 transitions. Word has length 81 [2023-03-31 01:49:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:10,566 INFO L495 AbstractCegarLoop]: Abstraction has 13129 states and 19124 transitions. [2023-03-31 01:49:10,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 01:49:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 13129 states and 19124 transitions. [2023-03-31 01:49:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 01:49:10,572 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:10,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:10,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:49:10,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:10,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:10,573 INFO L85 PathProgramCache]: Analyzing trace with hash 555745968, now seen corresponding path program 1 times [2023-03-31 01:49:10,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:10,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965971906] [2023-03-31 01:49:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:10,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:10,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965971906] [2023-03-31 01:49:10,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965971906] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:10,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:10,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:49:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281600830] [2023-03-31 01:49:10,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:10,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:49:10,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:49:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:49:10,725 INFO L87 Difference]: Start difference. First operand 13129 states and 19124 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 01:49:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:13,110 INFO L93 Difference]: Finished difference Result 21112 states and 30600 transitions. [2023-03-31 01:49:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:49:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 81 [2023-03-31 01:49:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:13,146 INFO L225 Difference]: With dead ends: 21112 [2023-03-31 01:49:13,146 INFO L226 Difference]: Without dead ends: 13942 [2023-03-31 01:49:13,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:49:13,162 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 90 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:13,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 337 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:49:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13942 states. [2023-03-31 01:49:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13942 to 13336. [2023-03-31 01:49:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13336 states, 13332 states have (on average 1.4324932493249325) internal successors, (19098), 13332 states have internal predecessors, (19098), 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) [2023-03-31 01:49:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13336 states to 13336 states and 19101 transitions. [2023-03-31 01:49:14,987 INFO L78 Accepts]: Start accepts. Automaton has 13336 states and 19101 transitions. Word has length 81 [2023-03-31 01:49:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:14,987 INFO L495 AbstractCegarLoop]: Abstraction has 13336 states and 19101 transitions. [2023-03-31 01:49:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 01:49:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 13336 states and 19101 transitions. [2023-03-31 01:49:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 01:49:14,994 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:14,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:14,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 01:49:14,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:14,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1990000322, now seen corresponding path program 1 times [2023-03-31 01:49:14,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:14,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119892954] [2023-03-31 01:49:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:15,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 01:49:15,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119892954] [2023-03-31 01:49:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119892954] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:15,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:15,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 01:49:15,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147708440] [2023-03-31 01:49:15,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:15,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 01:49:15,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 01:49:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:49:15,289 INFO L87 Difference]: Start difference. First operand 13336 states and 19101 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2023-03-31 01:49:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:18,294 INFO L93 Difference]: Finished difference Result 23369 states and 33853 transitions. [2023-03-31 01:49:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 01:49:18,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 81 [2023-03-31 01:49:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:18,344 INFO L225 Difference]: With dead ends: 23369 [2023-03-31 01:49:18,345 INFO L226 Difference]: Without dead ends: 20372 [2023-03-31 01:49:18,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-03-31 01:49:18,358 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 746 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:18,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 880 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:49:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20372 states. [2023-03-31 01:49:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20372 to 16240. [2023-03-31 01:49:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16240 states, 16236 states have (on average 1.4347129834934713) internal successors, (23294), 16236 states have internal predecessors, (23294), 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) [2023-03-31 01:49:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16240 states to 16240 states and 23297 transitions. [2023-03-31 01:49:20,438 INFO L78 Accepts]: Start accepts. Automaton has 16240 states and 23297 transitions. Word has length 81 [2023-03-31 01:49:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:20,438 INFO L495 AbstractCegarLoop]: Abstraction has 16240 states and 23297 transitions. [2023-03-31 01:49:20,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2023-03-31 01:49:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16240 states and 23297 transitions. [2023-03-31 01:49:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 01:49:20,444 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:20,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:20,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 01:49:20,445 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:20,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 80139637, now seen corresponding path program 1 times [2023-03-31 01:49:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:20,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548964087] [2023-03-31 01:49:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:20,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 01:49:20,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:20,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548964087] [2023-03-31 01:49:20,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548964087] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:20,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:20,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 01:49:20,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788415212] [2023-03-31 01:49:20,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:20,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 01:49:20,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:20,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 01:49:20,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:49:20,704 INFO L87 Difference]: Start difference. First operand 16240 states and 23297 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 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) [2023-03-31 01:49:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:24,067 INFO L93 Difference]: Finished difference Result 24286 states and 35139 transitions. [2023-03-31 01:49:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 01:49:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 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 81 [2023-03-31 01:49:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:24,109 INFO L225 Difference]: With dead ends: 24286 [2023-03-31 01:49:24,110 INFO L226 Difference]: Without dead ends: 22312 [2023-03-31 01:49:24,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-03-31 01:49:24,121 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 707 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:24,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 935 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:49:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22312 states. [2023-03-31 01:49:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22312 to 18180. [2023-03-31 01:49:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18180 states, 18176 states have (on average 1.4360695422535212) internal successors, (26102), 18176 states have internal predecessors, (26102), 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) [2023-03-31 01:49:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18180 states to 18180 states and 26105 transitions. [2023-03-31 01:49:26,408 INFO L78 Accepts]: Start accepts. Automaton has 18180 states and 26105 transitions. Word has length 81 [2023-03-31 01:49:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:26,408 INFO L495 AbstractCegarLoop]: Abstraction has 18180 states and 26105 transitions. [2023-03-31 01:49:26,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 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) [2023-03-31 01:49:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 18180 states and 26105 transitions. [2023-03-31 01:49:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 01:49:26,415 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:26,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:26,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 01:49:26,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:26,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1211225725, now seen corresponding path program 1 times [2023-03-31 01:49:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:26,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436594382] [2023-03-31 01:49:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:26,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:26,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436594382] [2023-03-31 01:49:26,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436594382] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:49:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181538388] [2023-03-31 01:49:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:26,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:49:26,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:49:26,869 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) [2023-03-31 01:49:26,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 01:49:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:27,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 01:49:27,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:49:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:49:27,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:49:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:49:27,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181538388] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:49:27,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:49:27,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2023-03-31 01:49:27,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656137469] [2023-03-31 01:49:27,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:49:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 01:49:27,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 01:49:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-03-31 01:49:27,483 INFO L87 Difference]: Start difference. First operand 18180 states and 26105 transitions. Second operand has 15 states, 15 states have (on average 14.933333333333334) internal successors, (224), 14 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)