/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_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:45:50,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:45:50,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:45:50,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:45:50,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:45:50,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:45:50,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:45:50,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:45:50,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:45:50,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:45:50,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:45:50,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:45:50,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:45:50,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:45:50,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:45:50,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:45:50,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:45:50,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:45:50,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:45:50,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:45:50,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:45:50,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:45:50,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:45:50,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:45:50,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 01:45:50,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 01:45:50,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 01:45:50,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 01:45:50,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 01:45:50,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 01:45:50,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:45:50,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:45:50,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:45:50,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:45:50,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:45:50,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:45:50,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:45:50,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:45:50,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:45:50,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:45:50,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:45:50,591 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 01:45:50,619 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:45:50,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:45:50,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:45:50,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:45:50,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:45:50,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:45:50,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:45:50,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:45:50,622 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:45:50,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:45:50,623 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:45:50,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:45:50,625 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:45:50,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:45:50,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:45:50,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:45:50,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:45:50,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:45:50,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:45:50,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:45:50,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:45:50,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:45:50,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:45:50,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:45:50,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:45:50,627 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:45:50,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:45:50,627 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:45:50,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:45:50,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:45:50,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:45:50,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:45:50,916 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:45:50,916 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:45:50,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-03-31 01:45:51,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:45:52,336 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:45:52,337 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-03-31 01:45:52,362 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/349d7da85/7f81590c21204807a77d1ed1067482b8/FLAG0328164c5 [2023-03-31 01:45:52,381 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/349d7da85/7f81590c21204807a77d1ed1067482b8 [2023-03-31 01:45:52,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:45:52,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:45:52,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:45:52,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:45:52,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:45:52,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:45:52" (1/1) ... [2023-03-31 01:45:52,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22eaa559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:52, skipping insertion in model container [2023-03-31 01:45:52,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:45:52" (1/1) ... [2023-03-31 01:45:52,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:45:52,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:45:52,794 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_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22084,22097] [2023-03-31 01:45:52,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:45:52,994 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:45:53,139 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_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22084,22097] [2023-03-31 01:45:53,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:45:53,235 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:45:53,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53 WrapperNode [2023-03-31 01:45:53,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:45:53,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:45:53,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:45:53,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:45:53,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,410 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:45:53,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:45:53,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:45:53,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:45:53,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (1/1) ... [2023-03-31 01:45:53,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:45:53,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:45:53,474 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 01:45:53,500 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 01:45:53,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:45:53,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:45:53,522 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:45:53,522 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:45:53,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:45:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:45:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:45:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:45:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:45:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-03-31 01:45:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:45:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:45:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:45:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:45:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:45:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:45:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:45:53,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:45:53,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:45:53,769 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:45:53,771 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:45:55,460 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:45:55,478 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:45:55,478 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:45:55,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:45:55 BoogieIcfgContainer [2023-03-31 01:45:55,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:45:55,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:45:55,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:45:55,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:45:55,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:45:52" (1/3) ... [2023-03-31 01:45:55,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cab63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:45:55, skipping insertion in model container [2023-03-31 01:45:55,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:45:53" (2/3) ... [2023-03-31 01:45:55,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cab63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:45:55, skipping insertion in model container [2023-03-31 01:45:55,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:45:55" (3/3) ... [2023-03-31 01:45:55,490 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-03-31 01:45:55,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:45:55,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:45:55,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:45:55,586 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;@6e4f2545, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:45:55,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:45:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 749 states, 735 states have (on average 1.8408163265306123) internal successors, (1353), 744 states have internal predecessors, (1353), 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 01:45:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-03-31 01:45:55,627 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:45:55,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:55,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:45:55,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:45:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2039642604, now seen corresponding path program 1 times [2023-03-31 01:45:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:45:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131949143] [2023-03-31 01:45:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:45:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:45:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:45:57,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:45:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:45:57,296 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 01:45:57,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:45:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131949143] [2023-03-31 01:45:57,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131949143] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:45:57,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:45:57,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:45:57,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545706480] [2023-03-31 01:45:57,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:45:57,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:45:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:45:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:45:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:45:57,350 INFO L87 Difference]: Start difference. First operand has 749 states, 735 states have (on average 1.8408163265306123) internal successors, (1353), 744 states have internal predecessors, (1353), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 01:46:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:01,855 INFO L93 Difference]: Finished difference Result 1138 states and 1990 transitions. [2023-03-31 01:46:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:46:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 208 [2023-03-31 01:46:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:01,873 INFO L225 Difference]: With dead ends: 1138 [2023-03-31 01:46:01,874 INFO L226 Difference]: Without dead ends: 913 [2023-03-31 01:46:01,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:01,880 INFO L413 NwaCegarLoop]: 1356 mSDtfsCounter, 343 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:01,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 2606 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-31 01:46:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-03-31 01:46:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 911. [2023-03-31 01:46:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 907 states have (on average 1.7254685777287762) internal successors, (1565), 907 states have internal predecessors, (1565), 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 01:46:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1568 transitions. [2023-03-31 01:46:01,979 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1568 transitions. Word has length 208 [2023-03-31 01:46:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:01,980 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1568 transitions. [2023-03-31 01:46:01,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 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 01:46:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1568 transitions. [2023-03-31 01:46:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-03-31 01:46:01,986 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:01,987 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:01,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:46:01,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:01,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash 723489073, now seen corresponding path program 1 times [2023-03-31 01:46:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:01,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150219474] [2023-03-31 01:46:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:02,911 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 01:46:02,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150219474] [2023-03-31 01:46:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150219474] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:02,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:02,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:46:02,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107825319] [2023-03-31 01:46:02,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:46:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:46:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:46:02,915 INFO L87 Difference]: Start difference. First operand 911 states and 1568 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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 01:46:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:06,733 INFO L93 Difference]: Finished difference Result 1617 states and 2728 transitions. [2023-03-31 01:46:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:46:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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 212 [2023-03-31 01:46:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:06,740 INFO L225 Difference]: With dead ends: 1617 [2023-03-31 01:46:06,741 INFO L226 Difference]: Without dead ends: 1253 [2023-03-31 01:46:06,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:06,744 INFO L413 NwaCegarLoop]: 1277 mSDtfsCounter, 285 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:06,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 2504 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 01:46:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2023-03-31 01:46:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1251. [2023-03-31 01:46:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1247 states have (on average 1.7008821170809945) internal successors, (2121), 1247 states have internal predecessors, (2121), 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 01:46:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2124 transitions. [2023-03-31 01:46:06,789 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2124 transitions. Word has length 212 [2023-03-31 01:46:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:06,790 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 2124 transitions. [2023-03-31 01:46:06,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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 01:46:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2124 transitions. [2023-03-31 01:46:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-03-31 01:46:06,794 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:06,794 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:46:06,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:06,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash -217843404, now seen corresponding path program 1 times [2023-03-31 01:46:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115100764] [2023-03-31 01:46:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:07,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:07,647 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 01:46:07,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115100764] [2023-03-31 01:46:07,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115100764] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:07,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:07,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:46:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723749085] [2023-03-31 01:46:07,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:07,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:46:07,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:46:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:46:07,650 INFO L87 Difference]: Start difference. First operand 1251 states and 2124 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 01:46:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:11,881 INFO L93 Difference]: Finished difference Result 2615 states and 4354 transitions. [2023-03-31 01:46:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:46:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 216 [2023-03-31 01:46:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:11,889 INFO L225 Difference]: With dead ends: 2615 [2023-03-31 01:46:11,890 INFO L226 Difference]: Without dead ends: 1911 [2023-03-31 01:46:11,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:11,893 INFO L413 NwaCegarLoop]: 1418 mSDtfsCounter, 278 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:11,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 2646 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 01:46:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-03-31 01:46:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1909. [2023-03-31 01:46:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1905 states have (on average 1.674015748031496) internal successors, (3189), 1905 states have internal predecessors, (3189), 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 01:46:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 3192 transitions. [2023-03-31 01:46:11,961 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 3192 transitions. Word has length 216 [2023-03-31 01:46:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:11,961 INFO L495 AbstractCegarLoop]: Abstraction has 1909 states and 3192 transitions. [2023-03-31 01:46:11,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 01:46:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 3192 transitions. [2023-03-31 01:46:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-03-31 01:46:11,966 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:11,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:11,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:46:11,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:11,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2126617202, now seen corresponding path program 1 times [2023-03-31 01:46:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173933129] [2023-03-31 01:46:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:12,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:12,700 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 01:46:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173933129] [2023-03-31 01:46:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173933129] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:12,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:12,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:46:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873624943] [2023-03-31 01:46:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:46:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:46:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:46:12,703 INFO L87 Difference]: Start difference. First operand 1909 states and 3192 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 01:46:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:16,510 INFO L93 Difference]: Finished difference Result 3292 states and 5462 transitions. [2023-03-31 01:46:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:46:16,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 220 [2023-03-31 01:46:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:16,522 INFO L225 Difference]: With dead ends: 3292 [2023-03-31 01:46:16,522 INFO L226 Difference]: Without dead ends: 2588 [2023-03-31 01:46:16,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:16,525 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 279 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2654 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:16,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2654 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 01:46:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2023-03-31 01:46:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2586. [2023-03-31 01:46:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2582 states have (on average 1.6626646010844306) internal successors, (4293), 2582 states have internal predecessors, (4293), 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 01:46:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 4296 transitions. [2023-03-31 01:46:16,637 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 4296 transitions. Word has length 220 [2023-03-31 01:46:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:16,637 INFO L495 AbstractCegarLoop]: Abstraction has 2586 states and 4296 transitions. [2023-03-31 01:46:16,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 01:46:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 4296 transitions. [2023-03-31 01:46:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-03-31 01:46:16,642 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:16,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:46:16,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:16,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1058759151, now seen corresponding path program 1 times [2023-03-31 01:46:16,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606644885] [2023-03-31 01:46:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:17,494 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 01:46:17,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:17,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606644885] [2023-03-31 01:46:17,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606644885] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:17,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:17,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:46:17,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264188454] [2023-03-31 01:46:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:17,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:46:17,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:46:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:46:17,508 INFO L87 Difference]: Start difference. First operand 2586 states and 4296 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 01:46:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:21,530 INFO L93 Difference]: Finished difference Result 6318 states and 10350 transitions. [2023-03-31 01:46:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:46:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 220 [2023-03-31 01:46:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:21,550 INFO L225 Difference]: With dead ends: 6318 [2023-03-31 01:46:21,550 INFO L226 Difference]: Without dead ends: 4386 [2023-03-31 01:46:21,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:21,557 INFO L413 NwaCegarLoop]: 1383 mSDtfsCounter, 271 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:21,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 2612 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 01:46:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2023-03-31 01:46:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4384. [2023-03-31 01:46:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4380 states have (on average 1.6394977168949771) internal successors, (7181), 4380 states have internal predecessors, (7181), 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 01:46:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 7184 transitions. [2023-03-31 01:46:21,745 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 7184 transitions. Word has length 220 [2023-03-31 01:46:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:21,745 INFO L495 AbstractCegarLoop]: Abstraction has 4384 states and 7184 transitions. [2023-03-31 01:46:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 01:46:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 7184 transitions. [2023-03-31 01:46:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-03-31 01:46:21,749 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:21,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:21,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:46:21,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:21,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1397821471, now seen corresponding path program 1 times [2023-03-31 01:46:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:21,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043758685] [2023-03-31 01:46:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:21,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:22,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:22,557 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 01:46:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:22,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043758685] [2023-03-31 01:46:22,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043758685] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:22,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:22,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:46:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36610368] [2023-03-31 01:46:22,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:22,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:46:22,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:46:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:46:22,560 INFO L87 Difference]: Start difference. First operand 4384 states and 7184 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 01:46:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:26,024 INFO L93 Difference]: Finished difference Result 7944 states and 12962 transitions. [2023-03-31 01:46:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:46:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 224 [2023-03-31 01:46:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:26,047 INFO L225 Difference]: With dead ends: 7944 [2023-03-31 01:46:26,047 INFO L226 Difference]: Without dead ends: 6012 [2023-03-31 01:46:26,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:26,055 INFO L413 NwaCegarLoop]: 1383 mSDtfsCounter, 272 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:26,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 2619 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 01:46:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2023-03-31 01:46:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6010. [2023-03-31 01:46:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6006 states have (on average 1.62987012987013) internal successors, (9789), 6006 states have internal predecessors, (9789), 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 01:46:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 9792 transitions. [2023-03-31 01:46:26,343 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 9792 transitions. Word has length 224 [2023-03-31 01:46:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:26,344 INFO L495 AbstractCegarLoop]: Abstraction has 6010 states and 9792 transitions. [2023-03-31 01:46:26,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 01:46:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 9792 transitions. [2023-03-31 01:46:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-03-31 01:46:26,348 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:26,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:26,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:46:26,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:26,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:26,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1648411732, now seen corresponding path program 1 times [2023-03-31 01:46:26,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:26,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816292693] [2023-03-31 01:46:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:26,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:27,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:27,208 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 01:46:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816292693] [2023-03-31 01:46:27,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816292693] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:27,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:27,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:46:27,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006896359] [2023-03-31 01:46:27,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:27,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:46:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:46:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:46:27,210 INFO L87 Difference]: Start difference. First operand 6010 states and 9792 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 01:46:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:30,599 INFO L93 Difference]: Finished difference Result 16142 states and 26054 transitions. [2023-03-31 01:46:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:46:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 224 [2023-03-31 01:46:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:30,650 INFO L225 Difference]: With dead ends: 16142 [2023-03-31 01:46:30,650 INFO L226 Difference]: Without dead ends: 10878 [2023-03-31 01:46:30,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:30,664 INFO L413 NwaCegarLoop]: 1279 mSDtfsCounter, 264 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:30,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2509 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 01:46:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10878 states. [2023-03-31 01:46:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10878 to 10876. [2023-03-31 01:46:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10876 states, 10872 states have (on average 1.6100993377483444) internal successors, (17505), 10872 states have internal predecessors, (17505), 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 01:46:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10876 states to 10876 states and 17508 transitions. [2023-03-31 01:46:31,214 INFO L78 Accepts]: Start accepts. Automaton has 10876 states and 17508 transitions. Word has length 224 [2023-03-31 01:46:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:31,215 INFO L495 AbstractCegarLoop]: Abstraction has 10876 states and 17508 transitions. [2023-03-31 01:46:31,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 01:46:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 10876 states and 17508 transitions. [2023-03-31 01:46:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-03-31 01:46:31,220 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:31,220 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:31,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:46:31,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:31,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1091153167, now seen corresponding path program 1 times [2023-03-31 01:46:31,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:31,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739518731] [2023-03-31 01:46:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:32,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:32,127 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 01:46:32,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739518731] [2023-03-31 01:46:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739518731] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:32,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:32,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:46:32,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124725235] [2023-03-31 01:46:32,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:32,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:46:32,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:46:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:46:32,130 INFO L87 Difference]: Start difference. First operand 10876 states and 17508 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 7 states have internal predecessors, (225), 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 01:46:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:46:38,629 INFO L93 Difference]: Finished difference Result 73823 states and 119142 transitions. [2023-03-31 01:46:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 01:46:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 7 states have internal predecessors, (225), 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 228 [2023-03-31 01:46:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:46:38,819 INFO L225 Difference]: With dead ends: 73823 [2023-03-31 01:46:38,820 INFO L226 Difference]: Without dead ends: 63555 [2023-03-31 01:46:38,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-03-31 01:46:38,859 INFO L413 NwaCegarLoop]: 1322 mSDtfsCounter, 3903 mSDsluCounter, 10684 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3903 SdHoareTripleChecker+Valid, 12006 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 01:46:38,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3903 Valid, 12006 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 01:46:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63555 states. [2023-03-31 01:46:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63555 to 20559. [2023-03-31 01:46:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 20555 states have (on average 1.6135733398199952) internal successors, (33167), 20555 states have internal predecessors, (33167), 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 01:46:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 33170 transitions. [2023-03-31 01:46:41,217 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 33170 transitions. Word has length 228 [2023-03-31 01:46:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:46:41,218 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 33170 transitions. [2023-03-31 01:46:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 7 states have internal predecessors, (225), 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 01:46:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 33170 transitions. [2023-03-31 01:46:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-03-31 01:46:41,222 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:46:41,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:41,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:46:41,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:46:41,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:46:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash 463264180, now seen corresponding path program 1 times [2023-03-31 01:46:41,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:46:41,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094098483] [2023-03-31 01:46:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:46:41,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:46:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:42,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:46:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:46:42,021 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 01:46:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:46:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094098483] [2023-03-31 01:46:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094098483] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:46:42,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:46:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:46:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489210187] [2023-03-31 01:46:42,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:46:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:46:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:46:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:46:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:46:42,024 INFO L87 Difference]: Start difference. First operand 20559 states and 33170 transitions. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 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)