/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:49:50,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:49:50,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:49:50,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:49:50,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:49:50,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:49:50,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:49:50,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:49:50,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:49:50,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:49:50,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:49:50,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:49:50,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:49:50,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:49:50,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:49:50,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:49:50,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:49:50,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:49:50,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:49:50,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:49:50,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:49:50,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:49:50,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:49:50,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:49:50,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 01:49:50,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:49:50,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:49:50,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:49:50,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:49:50,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:49:50,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:49:50,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:49:50,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:49:50,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:49:50,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:49:50,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:49:50,612 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 01:49:50,626 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:49:50,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:49:50,626 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:49:50,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:49:50,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:49:50,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:49:50,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:49:50,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:49:50,628 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:49:50,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:49:50,629 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:49:50,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:49:50,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:49:50,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:49:50,631 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:49:50,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:49:50,631 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:49:50,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:49:50,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:49:50,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:49:50,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:49:50,846 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:49:50,846 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:49:50,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-03-31 01:49:51,830 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:49:52,017 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:49:52,017 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-03-31 01:49:52,024 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab61d508/d7aa70d27174434499db3f9f857af8c9/FLAG499fd4238 [2023-03-31 01:49:52,039 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab61d508/d7aa70d27174434499db3f9f857af8c9 [2023-03-31 01:49:52,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:49:52,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:49:52,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:49:52,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:49:52,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:49:52,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5862386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52, skipping insertion in model container [2023-03-31 01:49:52,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:49:52,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:49:52,283 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-03-31 01:49:52,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:49:52,349 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:49:52,397 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-03-31 01:49:52,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:49:52,449 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:49:52,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52 WrapperNode [2023-03-31 01:49:52,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:49:52,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:49:52,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:49:52,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:49:52,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,495 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:49:52,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:49:52,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:49:52,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:49:52,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (1/1) ... [2023-03-31 01:49:52,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:49:52,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:49:52,590 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 01:49:52,604 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 01:49:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:49:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:49:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:49:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:49:52,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:49:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:49:52,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:49:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:49:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:49:52,717 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:49:52,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:49:53,253 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:49:53,260 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:49:53,260 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:49:53,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:49:53 BoogieIcfgContainer [2023-03-31 01:49:53,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:49:53,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:49:53,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:49:53,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:49:53,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:49:52" (1/3) ... [2023-03-31 01:49:53,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d7af5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:49:53, skipping insertion in model container [2023-03-31 01:49:53,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:49:52" (2/3) ... [2023-03-31 01:49:53,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d7af5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:49:53, skipping insertion in model container [2023-03-31 01:49:53,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:49:53" (3/3) ... [2023-03-31 01:49:53,267 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-03-31 01:49:53,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:49:53,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:49:53,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:49:53,332 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;@5da33c8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:49:53,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:49:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 215 states have (on average 1.716279069767442) internal successors, (369), 216 states have internal predecessors, (369), 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 01:49:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-03-31 01:49:53,351 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:53,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:53,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:53,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1864296050, now seen corresponding path program 1 times [2023-03-31 01:49:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:53,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166627530] [2023-03-31 01:49:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:54,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:54,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:54,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166627530] [2023-03-31 01:49:54,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166627530] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:54,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:54,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:49:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705344966] [2023-03-31 01:49:54,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:54,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:49:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:49:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:49:54,128 INFO L87 Difference]: Start difference. First operand has 221 states, 215 states have (on average 1.716279069767442) internal successors, (369), 216 states have internal predecessors, (369), 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 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:55,188 INFO L93 Difference]: Finished difference Result 879 states and 1415 transitions. [2023-03-31 01:49:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:49:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 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 85 [2023-03-31 01:49:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:55,215 INFO L225 Difference]: With dead ends: 879 [2023-03-31 01:49:55,215 INFO L226 Difference]: Without dead ends: 752 [2023-03-31 01:49:55,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:49:55,220 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 2427 mSDsluCounter, 2193 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2427 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:55,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2427 Valid, 2574 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 01:49:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-03-31 01:49:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 333. [2023-03-31 01:49:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 329 states have (on average 1.4984802431610942) internal successors, (493), 329 states have internal predecessors, (493), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 496 transitions. [2023-03-31 01:49:55,315 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 496 transitions. Word has length 85 [2023-03-31 01:49:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:55,316 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 496 transitions. [2023-03-31 01:49:55,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 496 transitions. [2023-03-31 01:49:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 01:49:55,318 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:55,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:55,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:49:55,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:55,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1681484202, now seen corresponding path program 1 times [2023-03-31 01:49:55,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:55,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271365419] [2023-03-31 01:49:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:55,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:55,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:55,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271365419] [2023-03-31 01:49:55,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271365419] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:55,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:55,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:49:55,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848113609] [2023-03-31 01:49:55,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:49:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:49:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:49:55,717 INFO L87 Difference]: Start difference. First operand 333 states and 496 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:56,872 INFO L93 Difference]: Finished difference Result 1429 states and 2203 transitions. [2023-03-31 01:49:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 01:49:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 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 86 [2023-03-31 01:49:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:56,877 INFO L225 Difference]: With dead ends: 1429 [2023-03-31 01:49:56,879 INFO L226 Difference]: Without dead ends: 1181 [2023-03-31 01:49:56,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:49:56,891 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 1235 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:56,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 1576 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 01:49:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2023-03-31 01:49:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1173. [2023-03-31 01:49:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1169 states have (on average 1.5380667236954662) internal successors, (1798), 1169 states have internal predecessors, (1798), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1801 transitions. [2023-03-31 01:49:57,015 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1801 transitions. Word has length 86 [2023-03-31 01:49:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:57,016 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1801 transitions. [2023-03-31 01:49:57,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1801 transitions. [2023-03-31 01:49:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 01:49:57,026 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:57,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:49:57,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:57,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:57,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1663547594, now seen corresponding path program 1 times [2023-03-31 01:49:57,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:57,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966079639] [2023-03-31 01:49:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:57,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:57,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:57,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:57,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966079639] [2023-03-31 01:49:57,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966079639] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:57,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:57,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:49:57,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033992194] [2023-03-31 01:49:57,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:57,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:49:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:57,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:49:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:49:57,246 INFO L87 Difference]: Start difference. First operand 1173 states and 1801 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:58,051 INFO L93 Difference]: Finished difference Result 3230 states and 5021 transitions. [2023-03-31 01:49:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:49:58,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 87 [2023-03-31 01:49:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:58,059 INFO L225 Difference]: With dead ends: 3230 [2023-03-31 01:49:58,059 INFO L226 Difference]: Without dead ends: 2104 [2023-03-31 01:49:58,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:49:58,064 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 1229 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:58,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1229 Valid, 298 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:49:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2023-03-31 01:49:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2102. [2023-03-31 01:49:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2098 states have (on average 1.5476644423260248) internal successors, (3247), 2098 states have internal predecessors, (3247), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 3250 transitions. [2023-03-31 01:49:58,287 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 3250 transitions. Word has length 87 [2023-03-31 01:49:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:58,287 INFO L495 AbstractCegarLoop]: Abstraction has 2102 states and 3250 transitions. [2023-03-31 01:49:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 3250 transitions. [2023-03-31 01:49:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 01:49:58,289 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:58,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:49:58,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:58,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1296536835, now seen corresponding path program 1 times [2023-03-31 01:49:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713990637] [2023-03-31 01:49:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:58,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:49:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:49:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713990637] [2023-03-31 01:49:58,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713990637] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:49:58,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:49:58,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:49:58,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714370718] [2023-03-31 01:49:58,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:49:58,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:49:58,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:49:58,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:49:58,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:49:58,499 INFO L87 Difference]: Start difference. First operand 2102 states and 3250 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:49:59,375 INFO L93 Difference]: Finished difference Result 5705 states and 8882 transitions. [2023-03-31 01:49:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:49:59,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 87 [2023-03-31 01:49:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:49:59,389 INFO L225 Difference]: With dead ends: 5705 [2023-03-31 01:49:59,389 INFO L226 Difference]: Without dead ends: 3719 [2023-03-31 01:49:59,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:49:59,397 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 1129 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:49:59,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 304 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:49:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2023-03-31 01:49:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3717. [2023-03-31 01:49:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3713 states have (on average 1.5478050094263398) internal successors, (5747), 3713 states have internal predecessors, (5747), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5750 transitions. [2023-03-31 01:49:59,799 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5750 transitions. Word has length 87 [2023-03-31 01:49:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:49:59,799 INFO L495 AbstractCegarLoop]: Abstraction has 3717 states and 5750 transitions. [2023-03-31 01:49:59,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:49:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5750 transitions. [2023-03-31 01:49:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 01:49:59,801 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:49:59,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:49:59,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:49:59,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:49:59,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:49:59,802 INFO L85 PathProgramCache]: Analyzing trace with hash -469128946, now seen corresponding path program 1 times [2023-03-31 01:49:59,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:49:59,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433689323] [2023-03-31 01:49:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:49:59,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:49:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:49:59,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:49:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:00,010 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 01:50:00,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:00,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433689323] [2023-03-31 01:50:00,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433689323] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:00,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:00,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:50:00,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142462222] [2023-03-31 01:50:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:50:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:50:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:50:00,017 INFO L87 Difference]: Start difference. First operand 3717 states and 5750 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 01:50:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:50:01,167 INFO L93 Difference]: Finished difference Result 10486 states and 16315 transitions. [2023-03-31 01:50:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:50:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 87 [2023-03-31 01:50:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:50:01,185 INFO L225 Difference]: With dead ends: 10486 [2023-03-31 01:50:01,186 INFO L226 Difference]: Without dead ends: 6919 [2023-03-31 01:50:01,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:50:01,191 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1115 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:50:01,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 313 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:50:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6919 states. [2023-03-31 01:50:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6919 to 6917. [2023-03-31 01:50:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6913 states have (on average 1.548676406769854) internal successors, (10706), 6913 states have internal predecessors, (10706), 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 01:50:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 10709 transitions. [2023-03-31 01:50:01,776 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 10709 transitions. Word has length 87 [2023-03-31 01:50:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:50:01,777 INFO L495 AbstractCegarLoop]: Abstraction has 6917 states and 10709 transitions. [2023-03-31 01:50:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 01:50:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 10709 transitions. [2023-03-31 01:50:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 01:50:01,780 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:01,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:01,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:50:01,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:50:01,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash -332605204, now seen corresponding path program 1 times [2023-03-31 01:50:01,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:01,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322895155] [2023-03-31 01:50:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:01,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:02,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:02,100 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 01:50:02,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:02,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322895155] [2023-03-31 01:50:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322895155] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:02,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:50:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650336586] [2023-03-31 01:50:02,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:02,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:50:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:50:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:50:02,102 INFO L87 Difference]: Start difference. First operand 6917 states and 10709 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 01:50:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:50:03,799 INFO L93 Difference]: Finished difference Result 20252 states and 31430 transitions. [2023-03-31 01:50:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:50:03,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 87 [2023-03-31 01:50:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:50:03,839 INFO L225 Difference]: With dead ends: 20252 [2023-03-31 01:50:03,839 INFO L226 Difference]: Without dead ends: 13421 [2023-03-31 01:50:03,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:50:03,851 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 1149 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:50:03,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 302 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:50:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2023-03-31 01:50:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 13419. [2023-03-31 01:50:05,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13419 states, 13415 states have (on average 1.543496086470369) internal successors, (20706), 13415 states have internal predecessors, (20706), 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 01:50:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13419 states to 13419 states and 20709 transitions. [2023-03-31 01:50:05,098 INFO L78 Accepts]: Start accepts. Automaton has 13419 states and 20709 transitions. Word has length 87 [2023-03-31 01:50:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:50:05,098 INFO L495 AbstractCegarLoop]: Abstraction has 13419 states and 20709 transitions. [2023-03-31 01:50:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 01:50:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 13419 states and 20709 transitions. [2023-03-31 01:50:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 01:50:05,102 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:05,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:05,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:50:05,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:50:05,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2128137509, now seen corresponding path program 1 times [2023-03-31 01:50:05,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:05,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688220568] [2023-03-31 01:50:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:05,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:05,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:05,324 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 01:50:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688220568] [2023-03-31 01:50:05,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688220568] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:05,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:05,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:50:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110767091] [2023-03-31 01:50:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:05,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:50:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:50:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:50:05,326 INFO L87 Difference]: Start difference. First operand 13419 states and 20709 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 01:50:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:50:08,088 INFO L93 Difference]: Finished difference Result 39810 states and 61522 transitions. [2023-03-31 01:50:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:50:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 87 [2023-03-31 01:50:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:50:08,143 INFO L225 Difference]: With dead ends: 39810 [2023-03-31 01:50:08,143 INFO L226 Difference]: Without dead ends: 26454 [2023-03-31 01:50:08,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:50:08,166 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1179 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:50:08,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 298 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:50:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26454 states. [2023-03-31 01:50:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26454 to 26452. [2023-03-31 01:50:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26452 states, 26448 states have (on average 1.535919540229885) internal successors, (40622), 26448 states have internal predecessors, (40622), 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 01:50:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26452 states to 26452 states and 40625 transitions. [2023-03-31 01:50:10,551 INFO L78 Accepts]: Start accepts. Automaton has 26452 states and 40625 transitions. Word has length 87 [2023-03-31 01:50:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:50:10,551 INFO L495 AbstractCegarLoop]: Abstraction has 26452 states and 40625 transitions. [2023-03-31 01:50:10,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 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 01:50:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 26452 states and 40625 transitions. [2023-03-31 01:50:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-31 01:50:10,556 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:10,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:10,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:50:10,557 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:50:10,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:10,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1956300331, now seen corresponding path program 1 times [2023-03-31 01:50:10,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:10,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155600930] [2023-03-31 01:50:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:10,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:10,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:10,888 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 01:50:10,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:10,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155600930] [2023-03-31 01:50:10,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155600930] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:10,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:10,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:50:10,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594143336] [2023-03-31 01:50:10,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:10,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:50:10,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:50:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:50:10,890 INFO L87 Difference]: Start difference. First operand 26452 states and 40625 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 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 01:50:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:50:15,931 INFO L93 Difference]: Finished difference Result 52694 states and 80658 transitions. [2023-03-31 01:50:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:50:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 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 88 [2023-03-31 01:50:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:50:16,038 INFO L225 Difference]: With dead ends: 52694 [2023-03-31 01:50:16,038 INFO L226 Difference]: Without dead ends: 52692 [2023-03-31 01:50:16,054 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 01:50:16,055 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 302 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:50:16,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1246 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:50:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52692 states. [2023-03-31 01:50:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52692 to 27092. [2023-03-31 01:50:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27092 states, 27088 states have (on average 1.5232575310100414) internal successors, (41262), 27088 states have internal predecessors, (41262), 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 01:50:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27092 states to 27092 states and 41265 transitions. [2023-03-31 01:50:19,284 INFO L78 Accepts]: Start accepts. Automaton has 27092 states and 41265 transitions. Word has length 88 [2023-03-31 01:50:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:50:19,284 INFO L495 AbstractCegarLoop]: Abstraction has 27092 states and 41265 transitions. [2023-03-31 01:50:19,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 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 01:50:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27092 states and 41265 transitions. [2023-03-31 01:50:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-03-31 01:50:19,305 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:19,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:19,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:50:19,305 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:50:19,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -239220882, now seen corresponding path program 1 times [2023-03-31 01:50:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:19,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902285246] [2023-03-31 01:50:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:19,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:19,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:19,581 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 01:50:19,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:19,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902285246] [2023-03-31 01:50:19,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902285246] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:19,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:19,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:50:19,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047192798] [2023-03-31 01:50:19,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:19,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:50:19,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:50:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:50:19,583 INFO L87 Difference]: Start difference. First operand 27092 states and 41265 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 01:50:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:50:25,306 INFO L93 Difference]: Finished difference Result 76312 states and 115939 transitions. [2023-03-31 01:50:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:50:25,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 89 [2023-03-31 01:50:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:50:25,390 INFO L225 Difference]: With dead ends: 76312 [2023-03-31 01:50:25,391 INFO L226 Difference]: Without dead ends: 50070 [2023-03-31 01:50:25,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:50:25,433 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 207 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:50:25,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 825 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:50:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50070 states. [2023-03-31 01:50:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50070 to 50068. [2023-03-31 01:50:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50068 states, 50064 states have (on average 1.5100271652285076) internal successors, (75598), 50064 states have internal predecessors, (75598), 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 01:50:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50068 states to 50068 states and 75601 transitions. [2023-03-31 01:50:30,931 INFO L78 Accepts]: Start accepts. Automaton has 50068 states and 75601 transitions. Word has length 89 [2023-03-31 01:50:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:50:30,931 INFO L495 AbstractCegarLoop]: Abstraction has 50068 states and 75601 transitions. [2023-03-31 01:50:30,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 01:50:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 50068 states and 75601 transitions. [2023-03-31 01:50:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 01:50:30,942 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:30,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:30,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:50:30,943 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:50:30,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2088177174, now seen corresponding path program 1 times [2023-03-31 01:50:30,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:30,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587871131] [2023-03-31 01:50:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:30,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:31,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:31,187 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 01:50:31,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587871131] [2023-03-31 01:50:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587871131] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:31,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:31,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:50:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147981430] [2023-03-31 01:50:31,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:31,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:50:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:50:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:50:31,189 INFO L87 Difference]: Start difference. First operand 50068 states and 75601 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 01:50:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:50:42,501 INFO L93 Difference]: Finished difference Result 118611 states and 179836 transitions. [2023-03-31 01:50:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:50:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 90 [2023-03-31 01:50:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:50:42,708 INFO L225 Difference]: With dead ends: 118611 [2023-03-31 01:50:42,708 INFO L226 Difference]: Without dead ends: 99409 [2023-03-31 01:50:42,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:50:42,744 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 1679 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 01:50:42,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1679 Valid, 1910 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 01:50:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99409 states. [2023-03-31 01:50:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99409 to 65937. [2023-03-31 01:50:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65937 states, 65933 states have (on average 1.509547571019065) internal successors, (99529), 65933 states have internal predecessors, (99529), 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 01:50:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65937 states to 65937 states and 99532 transitions. [2023-03-31 01:50:51,008 INFO L78 Accepts]: Start accepts. Automaton has 65937 states and 99532 transitions. Word has length 90 [2023-03-31 01:50:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:50:51,008 INFO L495 AbstractCegarLoop]: Abstraction has 65937 states and 99532 transitions. [2023-03-31 01:50:51,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 01:50:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 65937 states and 99532 transitions. [2023-03-31 01:50:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 01:50:51,015 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:50:51,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:50:51,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:50:51,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:50:51,016 INFO L85 PathProgramCache]: Analyzing trace with hash -901213738, now seen corresponding path program 1 times [2023-03-31 01:50:51,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:50:51,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255181358] [2023-03-31 01:50:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:50:51,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:50:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:51,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:50:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:50:51,149 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 01:50:51,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:50:51,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255181358] [2023-03-31 01:50:51,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255181358] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:50:51,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:50:51,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:50:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397707995] [2023-03-31 01:50:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:50:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:50:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:50:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:50:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:50:51,150 INFO L87 Difference]: Start difference. First operand 65937 states and 99532 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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)