/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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:52:38,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:52:38,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:52:38,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:52:38,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:52:38,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:52:38,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:52:38,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:52:38,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:52:38,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:52:38,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:52:38,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:52:38,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:52:38,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:52:38,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:52:38,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:52:38,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:52:38,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:52:38,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:52:38,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:52:38,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:52:38,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:52:38,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:52:38,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:52:38,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 01:52:38,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 01:52:38,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 01:52:38,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 01:52:38,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 01:52:38,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 01:52:38,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:52:38,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:52:38,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:52:38,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:52:38,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:52:38,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:52:38,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:52:38,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:52:38,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:52:38,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:52:38,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:52:38,045 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 01:52:38,059 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:52:38,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:52:38,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:52:38,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:52:38,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:52:38,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:52:38,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:52:38,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:52:38,061 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:52:38,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:52:38,062 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:52:38,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:52:38,063 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:52:38,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:52:38,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:52:38,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:52:38,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:52:38,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:52:38,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:52:38,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:52:38,065 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:52:38,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:52:38,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:52:38,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:52:38,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:52:38,269 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:52:38,269 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:52:38,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:52:39,321 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:52:39,519 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:52:39,519 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:52:39,524 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e74b61e4/f916564a863441fd9ae887a6441783a7/FLAG36e04cb14 [2023-03-31 01:52:39,880 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e74b61e4/f916564a863441fd9ae887a6441783a7 [2023-03-31 01:52:39,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:52:39,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:52:39,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:52:39,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:52:39,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:52:39,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:52:39" (1/1) ... [2023-03-31 01:52:39,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d7feb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:39, skipping insertion in model container [2023-03-31 01:52:39,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:52:39" (1/1) ... [2023-03-31 01:52:39,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:52:39,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:52:40,017 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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2023-03-31 01:52:40,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:52:40,040 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:52:40,058 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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2023-03-31 01:52:40,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:52:40,075 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:52:40,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40 WrapperNode [2023-03-31 01:52:40,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:52:40,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:52:40,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:52:40,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:52:40,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,099 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:52:40,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:52:40,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:52:40,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:52:40,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (1/1) ... [2023-03-31 01:52:40,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:52:40,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:52:40,125 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 01:52:40,126 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 01:52:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:52:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:52:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:52:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:52:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:52:40,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:52:40,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:52:40,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:52:40,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:52:40,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:52:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:52:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:52:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:52:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:52:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:52:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:52:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:52:40,225 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:52:40,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:52:40,530 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:52:40,535 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:52:40,535 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:52:40,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:52:40 BoogieIcfgContainer [2023-03-31 01:52:40,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:52:40,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:52:40,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:52:40,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:52:40,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:52:39" (1/3) ... [2023-03-31 01:52:40,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d8a618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:52:40, skipping insertion in model container [2023-03-31 01:52:40,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:52:40" (2/3) ... [2023-03-31 01:52:40,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d8a618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:52:40, skipping insertion in model container [2023-03-31 01:52:40,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:52:40" (3/3) ... [2023-03-31 01:52:40,543 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:52:40,563 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:52:40,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:52:40,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:52:40,601 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;@638320f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:52:40,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:52:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 65 states have internal predecessors, (106), 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 01:52:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 01:52:40,610 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:40,611 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] [2023-03-31 01:52:40,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:40,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:40,615 INFO L85 PathProgramCache]: Analyzing trace with hash -310817290, now seen corresponding path program 1 times [2023-03-31 01:52:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798926228] [2023-03-31 01:52:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:40,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:40,993 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 01:52:40,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:40,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798926228] [2023-03-31 01:52:40,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798926228] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:40,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:40,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:52:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425859550] [2023-03-31 01:52:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:40,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:52:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:52:41,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:52:41,022 INFO L87 Difference]: Start difference. First operand has 70 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 65 states have internal predecessors, (106), 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 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 01:52:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:41,383 INFO L93 Difference]: Finished difference Result 156 states and 237 transitions. [2023-03-31 01:52:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:52:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 41 [2023-03-31 01:52:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:41,394 INFO L225 Difference]: With dead ends: 156 [2023-03-31 01:52:41,394 INFO L226 Difference]: Without dead ends: 97 [2023-03-31 01:52:41,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:52:41,400 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 65 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:41,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 221 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:52:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-03-31 01:52:41,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-03-31 01:52:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.4395604395604396) internal successors, (131), 91 states have internal predecessors, (131), 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 01:52:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 134 transitions. [2023-03-31 01:52:41,448 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 134 transitions. Word has length 41 [2023-03-31 01:52:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:41,448 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 134 transitions. [2023-03-31 01:52:41,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 01:52:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 134 transitions. [2023-03-31 01:52:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 01:52:41,451 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:41,451 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] [2023-03-31 01:52:41,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:52:41,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:41,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1509343556, now seen corresponding path program 1 times [2023-03-31 01:52:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:41,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688252474] [2023-03-31 01:52:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:41,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:41,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:41,650 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 01:52:41,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688252474] [2023-03-31 01:52:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688252474] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:41,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:41,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:52:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034234563] [2023-03-31 01:52:41,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:52:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:52:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:52:41,654 INFO L87 Difference]: Start difference. First operand 95 states and 134 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 01:52:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:41,886 INFO L93 Difference]: Finished difference Result 223 states and 330 transitions. [2023-03-31 01:52:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:52:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 42 [2023-03-31 01:52:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:41,891 INFO L225 Difference]: With dead ends: 223 [2023-03-31 01:52:41,891 INFO L226 Difference]: Without dead ends: 151 [2023-03-31 01:52:41,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:52:41,893 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:41,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 171 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-03-31 01:52:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2023-03-31 01:52:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.4689655172413794) internal successors, (213), 145 states have internal predecessors, (213), 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 01:52:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 216 transitions. [2023-03-31 01:52:41,910 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 216 transitions. Word has length 42 [2023-03-31 01:52:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:41,910 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 216 transitions. [2023-03-31 01:52:41,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 01:52:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 216 transitions. [2023-03-31 01:52:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 01:52:41,911 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:41,911 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] [2023-03-31 01:52:41,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:52:41,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:41,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash -950835862, now seen corresponding path program 1 times [2023-03-31 01:52:41,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:41,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072137557] [2023-03-31 01:52:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:42,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:42,117 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 01:52:42,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:42,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072137557] [2023-03-31 01:52:42,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072137557] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:42,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:42,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:52:42,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070479584] [2023-03-31 01:52:42,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:42,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:42,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:42,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:42,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:42,121 INFO L87 Difference]: Start difference. First operand 149 states and 216 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 01:52:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:42,387 INFO L93 Difference]: Finished difference Result 905 states and 1374 transitions. [2023-03-31 01:52:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:52:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 43 [2023-03-31 01:52:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:42,391 INFO L225 Difference]: With dead ends: 905 [2023-03-31 01:52:42,392 INFO L226 Difference]: Without dead ends: 779 [2023-03-31 01:52:42,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 01:52:42,399 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 357 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:42,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 606 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-03-31 01:52:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 273. [2023-03-31 01:52:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.4907063197026023) internal successors, (401), 269 states have internal predecessors, (401), 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 01:52:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 404 transitions. [2023-03-31 01:52:42,453 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 404 transitions. Word has length 43 [2023-03-31 01:52:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:42,454 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 404 transitions. [2023-03-31 01:52:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 01:52:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 404 transitions. [2023-03-31 01:52:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 01:52:42,459 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:42,459 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] [2023-03-31 01:52:42,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:52:42,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:42,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash 181576965, now seen corresponding path program 1 times [2023-03-31 01:52:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:42,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95318767] [2023-03-31 01:52:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:42,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:42,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:42,571 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 01:52:42,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:42,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95318767] [2023-03-31 01:52:42,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95318767] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:42,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:42,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:52:42,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656210161] [2023-03-31 01:52:42,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:42,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:52:42,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:42,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:52:42,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:52:42,574 INFO L87 Difference]: Start difference. First operand 273 states and 404 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 01:52:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:42,751 INFO L93 Difference]: Finished difference Result 737 states and 1106 transitions. [2023-03-31 01:52:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:52:42,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 45 [2023-03-31 01:52:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:42,755 INFO L225 Difference]: With dead ends: 737 [2023-03-31 01:52:42,755 INFO L226 Difference]: Without dead ends: 487 [2023-03-31 01:52:42,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:52:42,764 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:42,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 141 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-03-31 01:52:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 477. [2023-03-31 01:52:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 473 states have (on average 1.4735729386892178) internal successors, (697), 473 states have internal predecessors, (697), 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 01:52:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 700 transitions. [2023-03-31 01:52:42,820 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 700 transitions. Word has length 45 [2023-03-31 01:52:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:42,821 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 700 transitions. [2023-03-31 01:52:42,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 01:52:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 700 transitions. [2023-03-31 01:52:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 01:52:42,823 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:42,823 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] [2023-03-31 01:52:42,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:52:42,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:42,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash 201626308, now seen corresponding path program 1 times [2023-03-31 01:52:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:42,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654082400] [2023-03-31 01:52:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:43,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:43,050 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 01:52:43,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:43,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654082400] [2023-03-31 01:52:43,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654082400] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:43,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:43,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:52:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583537527] [2023-03-31 01:52:43,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:43,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:43,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:43,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:43,052 INFO L87 Difference]: Start difference. First operand 477 states and 700 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 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 01:52:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:43,278 INFO L93 Difference]: Finished difference Result 933 states and 1378 transitions. [2023-03-31 01:52:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:52:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 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 45 [2023-03-31 01:52:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:43,280 INFO L225 Difference]: With dead ends: 933 [2023-03-31 01:52:43,280 INFO L226 Difference]: Without dead ends: 479 [2023-03-31 01:52:43,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:52:43,281 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 47 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:43,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 267 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-03-31 01:52:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2023-03-31 01:52:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 473 states have (on average 1.4566596194503172) internal successors, (689), 473 states have internal predecessors, (689), 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 01:52:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 692 transitions. [2023-03-31 01:52:43,316 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 692 transitions. Word has length 45 [2023-03-31 01:52:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:43,317 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 692 transitions. [2023-03-31 01:52:43,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 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 01:52:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 692 transitions. [2023-03-31 01:52:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 01:52:43,317 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:43,317 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] [2023-03-31 01:52:43,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:52:43,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:43,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash -379255383, now seen corresponding path program 1 times [2023-03-31 01:52:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:43,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791219307] [2023-03-31 01:52:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:43,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:43,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:43,397 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 01:52:43,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791219307] [2023-03-31 01:52:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791219307] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:43,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:43,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:52:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691270109] [2023-03-31 01:52:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:43,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:52:43,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:52:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:52:43,399 INFO L87 Difference]: Start difference. First operand 477 states and 692 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 01:52:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:43,621 INFO L93 Difference]: Finished difference Result 900 states and 1322 transitions. [2023-03-31 01:52:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:52:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 46 [2023-03-31 01:52:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:43,624 INFO L225 Difference]: With dead ends: 900 [2023-03-31 01:52:43,624 INFO L226 Difference]: Without dead ends: 649 [2023-03-31 01:52:43,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:52:43,625 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 53 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:43,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-03-31 01:52:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2023-03-31 01:52:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 643 states have (on average 1.447900466562986) internal successors, (931), 643 states have internal predecessors, (931), 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 01:52:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 934 transitions. [2023-03-31 01:52:43,671 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 934 transitions. Word has length 46 [2023-03-31 01:52:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:43,671 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 934 transitions. [2023-03-31 01:52:43,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 01:52:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 934 transitions. [2023-03-31 01:52:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 01:52:43,671 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:43,672 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] [2023-03-31 01:52:43,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:52:43,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:43,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1953538837, now seen corresponding path program 1 times [2023-03-31 01:52:43,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:43,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792958795] [2023-03-31 01:52:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:43,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:43,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:43,777 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 01:52:43,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792958795] [2023-03-31 01:52:43,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792958795] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:43,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:43,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:52:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502378827] [2023-03-31 01:52:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:43,779 INFO L87 Difference]: Start difference. First operand 647 states and 934 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 01:52:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:43,983 INFO L93 Difference]: Finished difference Result 1269 states and 1843 transitions. [2023-03-31 01:52:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:52:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) Word has length 46 [2023-03-31 01:52:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:43,985 INFO L225 Difference]: With dead ends: 1269 [2023-03-31 01:52:43,985 INFO L226 Difference]: Without dead ends: 647 [2023-03-31 01:52:43,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:52:43,987 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 189 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:43,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 75 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-03-31 01:52:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2023-03-31 01:52:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 643 states have (on average 1.4292379471228616) internal successors, (919), 643 states have internal predecessors, (919), 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 01:52:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 922 transitions. [2023-03-31 01:52:44,046 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 922 transitions. Word has length 46 [2023-03-31 01:52:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 922 transitions. [2023-03-31 01:52:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 01:52:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 922 transitions. [2023-03-31 01:52:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 01:52:44,047 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:44,047 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] [2023-03-31 01:52:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:52:44,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:44,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1424248336, now seen corresponding path program 1 times [2023-03-31 01:52:44,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:44,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875121075] [2023-03-31 01:52:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:44,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:44,146 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 01:52:44,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:44,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875121075] [2023-03-31 01:52:44,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875121075] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:44,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:44,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:52:44,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337914833] [2023-03-31 01:52:44,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:44,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:44,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:44,148 INFO L87 Difference]: Start difference. First operand 647 states and 922 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 01:52:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:44,426 INFO L93 Difference]: Finished difference Result 1687 states and 2428 transitions. [2023-03-31 01:52:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:52:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) Word has length 46 [2023-03-31 01:52:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:44,430 INFO L225 Difference]: With dead ends: 1687 [2023-03-31 01:52:44,430 INFO L226 Difference]: Without dead ends: 1065 [2023-03-31 01:52:44,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:52:44,431 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 335 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:44,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 93 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2023-03-31 01:52:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1063. [2023-03-31 01:52:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1059 states have (on average 1.4268177525967893) internal successors, (1511), 1059 states have internal predecessors, (1511), 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 01:52:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1514 transitions. [2023-03-31 01:52:44,521 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1514 transitions. Word has length 46 [2023-03-31 01:52:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:44,521 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1514 transitions. [2023-03-31 01:52:44,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 01:52:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1514 transitions. [2023-03-31 01:52:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 01:52:44,522 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:44,522 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] [2023-03-31 01:52:44,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:52:44,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:44,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1552333643, now seen corresponding path program 1 times [2023-03-31 01:52:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:44,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477562137] [2023-03-31 01:52:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:44,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:44,683 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 01:52:44,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:44,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477562137] [2023-03-31 01:52:44,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477562137] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:44,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:44,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:52:44,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494032993] [2023-03-31 01:52:44,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:44,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:44,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:44,684 INFO L87 Difference]: Start difference. First operand 1063 states and 1514 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 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 01:52:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:45,005 INFO L93 Difference]: Finished difference Result 1603 states and 2272 transitions. [2023-03-31 01:52:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:52:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 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 46 [2023-03-31 01:52:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:45,011 INFO L225 Difference]: With dead ends: 1603 [2023-03-31 01:52:45,011 INFO L226 Difference]: Without dead ends: 1601 [2023-03-31 01:52:45,012 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 01:52:45,012 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 111 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:45,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 380 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2023-03-31 01:52:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1095. [2023-03-31 01:52:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1091 states have (on average 1.3959670027497708) internal successors, (1523), 1091 states have internal predecessors, (1523), 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 01:52:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1526 transitions. [2023-03-31 01:52:45,114 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1526 transitions. Word has length 46 [2023-03-31 01:52:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:45,114 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1526 transitions. [2023-03-31 01:52:45,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 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 01:52:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1526 transitions. [2023-03-31 01:52:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 01:52:45,115 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:45,115 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] [2023-03-31 01:52:45,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:52:45,115 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:45,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:45,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2103834166, now seen corresponding path program 1 times [2023-03-31 01:52:45,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:45,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084986747] [2023-03-31 01:52:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:45,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 01:52:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:45,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084986747] [2023-03-31 01:52:45,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084986747] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:45,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:45,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:52:45,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126282973] [2023-03-31 01:52:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:45,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:45,232 INFO L87 Difference]: Start difference. First operand 1095 states and 1526 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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 01:52:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:45,754 INFO L93 Difference]: Finished difference Result 4621 states and 6459 transitions. [2023-03-31 01:52:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:52:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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 65 [2023-03-31 01:52:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:45,765 INFO L225 Difference]: With dead ends: 4621 [2023-03-31 01:52:45,765 INFO L226 Difference]: Without dead ends: 3551 [2023-03-31 01:52:45,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:52:45,767 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 211 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:45,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 356 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:52:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2023-03-31 01:52:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2163. [2023-03-31 01:52:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2159 states have (on average 1.3909217230199167) internal successors, (3003), 2159 states have internal predecessors, (3003), 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 01:52:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3006 transitions. [2023-03-31 01:52:45,984 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3006 transitions. Word has length 65 [2023-03-31 01:52:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:45,984 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 3006 transitions. [2023-03-31 01:52:45,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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 01:52:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3006 transitions. [2023-03-31 01:52:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 01:52:45,985 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:45,985 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] [2023-03-31 01:52:45,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:52:45,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:45,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2080088944, now seen corresponding path program 1 times [2023-03-31 01:52:45,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:45,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930747889] [2023-03-31 01:52:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:45,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 01:52:46,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:46,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930747889] [2023-03-31 01:52:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930747889] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:46,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:46,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:52:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687857165] [2023-03-31 01:52:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:46,091 INFO L87 Difference]: Start difference. First operand 2163 states and 3006 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 01:52:46,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:46,777 INFO L93 Difference]: Finished difference Result 5689 states and 7939 transitions. [2023-03-31 01:52:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:52:46,778 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 65 [2023-03-31 01:52:46,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:46,790 INFO L225 Difference]: With dead ends: 5689 [2023-03-31 01:52:46,790 INFO L226 Difference]: Without dead ends: 4619 [2023-03-31 01:52:46,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:52:46,793 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 214 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:46,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 365 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:52:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2023-03-31 01:52:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 3751. [2023-03-31 01:52:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3747 states have (on average 1.384841206298372) internal successors, (5189), 3747 states have internal predecessors, (5189), 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 01:52:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 5192 transitions. [2023-03-31 01:52:47,182 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 5192 transitions. Word has length 65 [2023-03-31 01:52:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:47,182 INFO L495 AbstractCegarLoop]: Abstraction has 3751 states and 5192 transitions. [2023-03-31 01:52:47,182 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 01:52:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 5192 transitions. [2023-03-31 01:52:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-31 01:52:47,183 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:47,183 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:52:47,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 01:52:47,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:47,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1672095355, now seen corresponding path program 1 times [2023-03-31 01:52:47,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:47,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618689393] [2023-03-31 01:52:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:47,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:47,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:52:47,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:47,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618689393] [2023-03-31 01:52:47,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618689393] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:47,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:47,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:52:47,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86444053] [2023-03-31 01:52:47,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:52:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:52:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:52:47,317 INFO L87 Difference]: Start difference. First operand 3751 states and 5192 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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 01:52:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:48,166 INFO L93 Difference]: Finished difference Result 6349 states and 8867 transitions. [2023-03-31 01:52:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:52:48,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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 66 [2023-03-31 01:52:48,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:48,181 INFO L225 Difference]: With dead ends: 6349 [2023-03-31 01:52:48,181 INFO L226 Difference]: Without dead ends: 5483 [2023-03-31 01:52:48,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:52:48,184 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 203 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:48,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 395 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:52:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2023-03-31 01:52:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 4615. [2023-03-31 01:52:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4615 states, 4611 states have (on average 1.3873346345695077) internal successors, (6397), 4611 states have internal predecessors, (6397), 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 01:52:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4615 states to 4615 states and 6400 transitions. [2023-03-31 01:52:48,657 INFO L78 Accepts]: Start accepts. Automaton has 4615 states and 6400 transitions. Word has length 66 [2023-03-31 01:52:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:48,657 INFO L495 AbstractCegarLoop]: Abstraction has 4615 states and 6400 transitions. [2023-03-31 01:52:48,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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 01:52:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4615 states and 6400 transitions. [2023-03-31 01:52:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 01:52:48,658 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:48,658 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] [2023-03-31 01:52:48,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 01:52:48,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:48,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1957571589, now seen corresponding path program 1 times [2023-03-31 01:52:48,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:48,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221211779] [2023-03-31 01:52:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:48,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:52:48,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:48,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221211779] [2023-03-31 01:52:48,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221211779] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:52:48,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:52:48,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:52:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997765319] [2023-03-31 01:52:48,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:52:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:52:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:52:48,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:52:48,763 INFO L87 Difference]: Start difference. First operand 4615 states and 6400 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 01:52:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:52:49,238 INFO L93 Difference]: Finished difference Result 8517 states and 11853 transitions. [2023-03-31 01:52:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 01:52:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 67 [2023-03-31 01:52:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:52:49,249 INFO L225 Difference]: With dead ends: 8517 [2023-03-31 01:52:49,249 INFO L226 Difference]: Without dead ends: 3927 [2023-03-31 01:52:49,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:52:49,255 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 36 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:52:49,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 175 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:52:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2023-03-31 01:52:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3925. [2023-03-31 01:52:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3921 states have (on average 1.3774547309359857) internal successors, (5401), 3921 states have internal predecessors, (5401), 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 01:52:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 5404 transitions. [2023-03-31 01:52:49,716 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 5404 transitions. Word has length 67 [2023-03-31 01:52:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:52:49,716 INFO L495 AbstractCegarLoop]: Abstraction has 3925 states and 5404 transitions. [2023-03-31 01:52:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 01:52:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 5404 transitions. [2023-03-31 01:52:49,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 01:52:49,719 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:52:49,719 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:52:49,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 01:52:49,719 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:52:49,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:52:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1021568462, now seen corresponding path program 1 times [2023-03-31 01:52:49,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:52:49,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268424481] [2023-03-31 01:52:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:49,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:52:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:50,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:52:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:52:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:52:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268424481] [2023-03-31 01:52:50,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268424481] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:52:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798771431] [2023-03-31 01:52:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:52:50,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:52:50,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:52:50,051 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 01:52:50,080 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 01:52:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:52:50,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 34 conjunts are in the unsatisfiable core [2023-03-31 01:52:50,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:52:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:52:53,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:52:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:52:54,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798771431] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:52:54,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:52:54,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 17] total 42 [2023-03-31 01:52:54,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954683179] [2023-03-31 01:52:54,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:52:54,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-03-31 01:52:54,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:52:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-03-31 01:52:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2023-03-31 01:52:54,380 INFO L87 Difference]: Start difference. First operand 3925 states and 5404 transitions. Second operand has 42 states, 42 states have (on average 4.166666666666667) internal successors, (175), 41 states have internal predecessors, (175), 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)