./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:47:49,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:47:49,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:47:49,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:47:49,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:47:49,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:47:49,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:47:49,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:47:49,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:47:49,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:47:49,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:47:49,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:47:49,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:47:49,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:47:49,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:47:49,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:47:49,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:47:49,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:47:49,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:47:49,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:47:49,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:47:49,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:47:49,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:47:49,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:47:49,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:47:49,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:47:49,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:47:49,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:47:49,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:47:49,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:47:49,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:47:49,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:47:49,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:47:49,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:47:49,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:47:49,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:47:49,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:47:49,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:47:49,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:47:49,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:47:49,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:47:49,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:47:49,680 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:47:49,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:47:49,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:47:49,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:47:49,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:47:49,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:47:49,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:47:49,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:47:49,683 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:47:49,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:47:49,684 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:47:49,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:47:49,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:47:49,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:47:49,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:47:49,685 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:47:49,685 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:47:49,686 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:47:49,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:47:49,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:47:49,686 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:47:49,686 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:47:49,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:47:49,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:47:49,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:47:49,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:47:49,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:47:49,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:47:49,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:47:49,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:47:49,688 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:47:49,688 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:47:49,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:47:49,689 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:47:49,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:47:49,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:47:50,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:47:50,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:47:50,025 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:47:50,026 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:47:50,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 00:47:51,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:47:51,346 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:47:51,346 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 00:47:51,353 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6206d7c51/fc37ffa6fec644c2b878a04f302acb10/FLAGb5b126159 [2023-08-30 00:47:51,363 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6206d7c51/fc37ffa6fec644c2b878a04f302acb10 [2023-08-30 00:47:51,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:47:51,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:47:51,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:47:51,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:47:51,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:47:51,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4391cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51, skipping insertion in model container [2023-08-30 00:47:51,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:47:51,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:47:51,567 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 00:47:51,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:47:51,581 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:47:51,605 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-30 00:47:51,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:47:51,634 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:47:51,635 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:47:51,640 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:47:51,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51 WrapperNode [2023-08-30 00:47:51,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:47:51,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:47:51,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:47:51,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:47:51,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,689 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-08-30 00:47:51,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:47:51,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:47:51,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:47:51,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:47:51,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,724 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:47:51,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:47:51,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:47:51,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:47:51,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (1/1) ... [2023-08-30 00:47:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:47:51,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:51,766 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) [2023-08-30 00:47:51,788 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 [2023-08-30 00:47:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:47:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:47:51,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:47:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:47:51,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:47:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 00:47:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:47:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 00:47:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:47:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:47:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:47:51,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:47:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 00:47:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:47:51,813 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:47:51,914 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:47:51,915 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:47:52,142 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:47:52,186 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:47:52,187 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 00:47:52,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:47:52 BoogieIcfgContainer [2023-08-30 00:47:52,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:47:52,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:47:52,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:47:52,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:47:52,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:47:51" (1/3) ... [2023-08-30 00:47:52,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6334676f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:47:52, skipping insertion in model container [2023-08-30 00:47:52,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:51" (2/3) ... [2023-08-30 00:47:52,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6334676f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:47:52, skipping insertion in model container [2023-08-30 00:47:52,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:47:52" (3/3) ... [2023-08-30 00:47:52,196 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-08-30 00:47:52,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:47:52,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 00:47:52,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:47:52,271 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 00:47:52,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 202 flow [2023-08-30 00:47:52,362 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2023-08-30 00:47:52,362 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:47:52,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 91 events. 6/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-30 00:47:52,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 93 transitions, 202 flow [2023-08-30 00:47:52,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 87 transitions, 186 flow [2023-08-30 00:47:52,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:47:52,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 87 transitions, 186 flow [2023-08-30 00:47:52,383 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 87 transitions, 186 flow [2023-08-30 00:47:52,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 186 flow [2023-08-30 00:47:52,430 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2023-08-30 00:47:52,430 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:47:52,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-30 00:47:52,433 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-30 00:47:55,380 INFO L134 LiptonReduction]: Checked pairs total: 633 [2023-08-30 00:47:55,380 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-30 00:47:55,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:47:55,404 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@4adf93ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:47:55,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 00:47:55,405 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 00:47:55,405 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:47:55,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:55,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 00:47:55,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:55,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash 370, now seen corresponding path program 1 times [2023-08-30 00:47:55,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:55,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408973331] [2023-08-30 00:47:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:55,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408973331] [2023-08-30 00:47:55,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408973331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:55,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:55,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 00:47:55,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276492428] [2023-08-30 00:47:55,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:55,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 00:47:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:55,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 00:47:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 00:47:55,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 178 [2023-08-30 00:47:55,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:55,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 178 [2023-08-30 00:47:55,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:55,643 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 00:47:55,644 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 00:47:55,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 521 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 00:47:55,647 INFO L137 encePairwiseOnDemand]: 175/178 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 00:47:55,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 00:47:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 00:47:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 00:47:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 186 transitions. [2023-08-30 00:47:55,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224719101123596 [2023-08-30 00:47:55,661 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 186 transitions. [2023-08-30 00:47:55,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 186 transitions. [2023-08-30 00:47:55,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:55,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 186 transitions. [2023-08-30 00:47:55,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,675 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,677 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 186 transitions. [2023-08-30 00:47:55,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 00:47:55,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:47:55,681 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 00:47:55,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 00:47:55,687 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:47:55,687 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 00:47:55,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:55,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:47:55,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 00:47:55,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:55,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 362683, now seen corresponding path program 1 times [2023-08-30 00:47:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:55,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229158279] [2023-08-30 00:47:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:55,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:55,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229158279] [2023-08-30 00:47:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229158279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:55,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:55,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284413226] [2023-08-30 00:47:55,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:55,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 178 [2023-08-30 00:47:55,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:55,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 178 [2023-08-30 00:47:55,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:55,918 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 00:47:55,918 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:47:55,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 464 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 00:47:55,920 INFO L137 encePairwiseOnDemand]: 175/178 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 00:47:55,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 00:47:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-30 00:47:55,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681647940074906 [2023-08-30 00:47:55,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-30 00:47:55,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-30 00:47:55,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:55,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-30 00:47:55,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,932 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 250 transitions. [2023-08-30 00:47:55,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 00:47:55,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:47:55,933 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 00:47:55,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 00:47:55,934 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:47:55,934 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 00:47:55,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:55,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:47:55,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 00:47:55,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:55,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash 362682, now seen corresponding path program 1 times [2023-08-30 00:47:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:55,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515970717] [2023-08-30 00:47:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:55,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:56,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:56,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515970717] [2023-08-30 00:47:56,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515970717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:56,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:56,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:56,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176659220] [2023-08-30 00:47:56,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:56,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:56,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:56,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 178 [2023-08-30 00:47:56,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:56,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 178 [2023-08-30 00:47:56,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:56,115 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 00:47:56,116 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:47:56,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 421 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 00:47:56,117 INFO L137 encePairwiseOnDemand]: 175/178 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 00:47:56,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 00:47:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-30 00:47:56,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419475655430712 [2023-08-30 00:47:56,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-30 00:47:56,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-30 00:47:56,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:56,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-30 00:47:56,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,122 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 236 transitions. [2023-08-30 00:47:56,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 00:47:56,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:56,123 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 00:47:56,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-30 00:47:56,124 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:47:56,124 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 00:47:56,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:56,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:47:56,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 00:47:56,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:56,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash 348544549, now seen corresponding path program 1 times [2023-08-30 00:47:56,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:56,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321690100] [2023-08-30 00:47:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:56,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321690100] [2023-08-30 00:47:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321690100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:56,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:56,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:47:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116950656] [2023-08-30 00:47:56,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:56,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:47:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:56,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:47:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:47:56,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 178 [2023-08-30 00:47:56,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:56,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 178 [2023-08-30 00:47:56,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:56,320 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 00:47:56,320 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:47:56,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 294 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 00:47:56,323 INFO L137 encePairwiseOnDemand]: 176/178 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 00:47:56,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 00:47:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-30 00:47:56,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157303370786517 [2023-08-30 00:47:56,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-30 00:47:56,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-30 00:47:56,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:56,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-30 00:47:56,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,333 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 222 transitions. [2023-08-30 00:47:56,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 00:47:56,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:56,334 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 00:47:56,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-30 00:47:56,335 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:47:56,336 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 00:47:56,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:56,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:47:56,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 00:47:56,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:56,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:56,337 INFO L85 PathProgramCache]: Analyzing trace with hash 348544550, now seen corresponding path program 1 times [2023-08-30 00:47:56,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:56,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775142152] [2023-08-30 00:47:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:56,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:56,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775142152] [2023-08-30 00:47:56,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775142152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:56,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:56,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:47:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20873785] [2023-08-30 00:47:56,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:56,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:47:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:47:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:47:56,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 178 [2023-08-30 00:47:56,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:56,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 178 [2023-08-30 00:47:56,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:56,510 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 00:47:56,510 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:47:56,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 177 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 00:47:56,511 INFO L137 encePairwiseOnDemand]: 176/178 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 00:47:56,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 00:47:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-30 00:47:56,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44756554307116103 [2023-08-30 00:47:56,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-30 00:47:56,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-30 00:47:56,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:56,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-30 00:47:56,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,516 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 239 transitions. [2023-08-30 00:47:56,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 00:47:56,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:56,517 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 00:47:56,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 00:47:56,518 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:47:56,518 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 00:47:56,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:56,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 00:47:56,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:56,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash -545852935, now seen corresponding path program 1 times [2023-08-30 00:47:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:56,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018693443] [2023-08-30 00:47:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:56,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:56,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:56,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018693443] [2023-08-30 00:47:56,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018693443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:56,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:56,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:47:56,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244036535] [2023-08-30 00:47:56,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:56,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:47:56,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:47:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:47:56,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 178 [2023-08-30 00:47:56,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:56,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 178 [2023-08-30 00:47:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:56,666 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-08-30 00:47:56,666 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:47:56,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 100 events. 59/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 263 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 207. Up to 78 conditions per place. [2023-08-30 00:47:56,667 INFO L137 encePairwiseOnDemand]: 174/178 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 00:47:56,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-30 00:47:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:47:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:47:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2023-08-30 00:47:56,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45646067415730335 [2023-08-30 00:47:56,669 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 325 transitions. [2023-08-30 00:47:56,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 325 transitions. [2023-08-30 00:47:56,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:56,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 325 transitions. [2023-08-30 00:47:56,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,673 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 325 transitions. [2023-08-30 00:47:56,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-30 00:47:56,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:56,674 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-08-30 00:47:56,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-30 00:47:56,674 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-08-30 00:47:56,675 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-08-30 00:47:56,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:56,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:56,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:56,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 00:47:56,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:56,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash -542162252, now seen corresponding path program 1 times [2023-08-30 00:47:56,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:56,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738751753] [2023-08-30 00:47:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:56,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:56,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738751753] [2023-08-30 00:47:56,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738751753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:56,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608628036] [2023-08-30 00:47:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:56,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:56,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:56,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:56,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 00:47:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:47:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:56,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:47:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:56,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608628036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:47:56,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:47:56,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-30 00:47:56,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039631476] [2023-08-30 00:47:56,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:47:56,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 00:47:56,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:56,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 00:47:56,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 00:47:57,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 178 [2023-08-30 00:47:57,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:57,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 178 [2023-08-30 00:47:57,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:57,082 INFO L130 PetriNetUnfolder]: 73/133 cut-off events. [2023-08-30 00:47:57,082 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-30 00:47:57,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 133 events. 73/133 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 355 event pairs, 15 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 335. Up to 79 conditions per place. [2023-08-30 00:47:57,083 INFO L137 encePairwiseOnDemand]: 173/178 looper letters, 25 selfloop transitions, 7 changer transitions 9/42 dead transitions. [2023-08-30 00:47:57,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 201 flow [2023-08-30 00:47:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:47:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:47:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 498 transitions. [2023-08-30 00:47:57,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46629213483146065 [2023-08-30 00:47:57,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 498 transitions. [2023-08-30 00:47:57,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 498 transitions. [2023-08-30 00:47:57,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:57,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 498 transitions. [2023-08-30 00:47:57,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.0) internal successors, (498), 6 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,090 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 178.0) internal successors, (1246), 7 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,090 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 6 states and 498 transitions. [2023-08-30 00:47:57,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 201 flow [2023-08-30 00:47:57,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 191 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 00:47:57,092 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 102 flow [2023-08-30 00:47:57,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-30 00:47:57,093 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-30 00:47:57,093 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 102 flow [2023-08-30 00:47:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:57,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:57,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:47:57,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:57,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:57,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash -677663927, now seen corresponding path program 1 times [2023-08-30 00:47:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:57,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136189531] [2023-08-30 00:47:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:57,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136189531] [2023-08-30 00:47:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136189531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980539647] [2023-08-30 00:47:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:57,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:57,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:57,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 00:47:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:47:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:57,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:47:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:57,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980539647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:47:57,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:47:57,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 00:47:58,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657766929] [2023-08-30 00:47:58,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:47:58,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:47:58,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:47:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:47:58,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:47:58,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 102 flow. Second operand has 20 states, 20 states have (on average 71.8) internal successors, (1436), 20 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:58,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:58,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:47:58,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:58,629 INFO L130 PetriNetUnfolder]: 162/304 cut-off events. [2023-08-30 00:47:58,629 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-08-30 00:47:58,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 304 events. 162/304 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1145 event pairs, 5 based on Foata normal form. 3/307 useless extension candidates. Maximal degree in co-relation 931. Up to 101 conditions per place. [2023-08-30 00:47:58,631 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 45 selfloop transitions, 25 changer transitions 45/115 dead transitions. [2023-08-30 00:47:58,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 641 flow [2023-08-30 00:47:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 00:47:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 00:47:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1300 transitions. [2023-08-30 00:47:58,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961004626569727 [2023-08-30 00:47:58,635 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1300 transitions. [2023-08-30 00:47:58,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1300 transitions. [2023-08-30 00:47:58,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:58,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1300 transitions. [2023-08-30 00:47:58,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.47058823529412) internal successors, (1300), 17 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:58,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 178.0) internal successors, (3204), 18 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:58,643 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 178.0) internal successors, (3204), 18 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:58,643 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 102 flow. Second operand 17 states and 1300 transitions. [2023-08-30 00:47:58,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 641 flow [2023-08-30 00:47:58,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 115 transitions, 625 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-30 00:47:58,648 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 282 flow [2023-08-30 00:47:58,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=282, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-30 00:47:58,648 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-08-30 00:47:58,649 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 282 flow [2023-08-30 00:47:58,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.8) internal successors, (1436), 20 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:58,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:58,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:58,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:47:58,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-30 00:47:58,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:47:58,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1257156723, now seen corresponding path program 2 times [2023-08-30 00:47:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:58,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742421351] [2023-08-30 00:47:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:58,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:59,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:59,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742421351] [2023-08-30 00:47:59,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742421351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:59,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776202875] [2023-08-30 00:47:59,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:47:59,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:59,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:59,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 00:47:59,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:47:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:47:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:47:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:59,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:00,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776202875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:00,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:00,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 00:48:00,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395638149] [2023-08-30 00:48:00,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:00,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:48:00,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:48:00,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:48:00,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:00,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 282 flow. Second operand has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:00,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:00,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:00,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:01,034 INFO L130 PetriNetUnfolder]: 164/323 cut-off events. [2023-08-30 00:48:01,035 INFO L131 PetriNetUnfolder]: For 833/833 co-relation queries the response was YES. [2023-08-30 00:48:01,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 323 events. 164/323 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1271 event pairs, 10 based on Foata normal form. 10/333 useless extension candidates. Maximal degree in co-relation 1341. Up to 105 conditions per place. [2023-08-30 00:48:01,037 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 62 selfloop transitions, 30 changer transitions 23/115 dead transitions. [2023-08-30 00:48:01,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 881 flow [2023-08-30 00:48:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:48:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:48:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1149 transitions. [2023-08-30 00:48:01,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303370786516854 [2023-08-30 00:48:01,044 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1149 transitions. [2023-08-30 00:48:01,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1149 transitions. [2023-08-30 00:48:01,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:01,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1149 transitions. [2023-08-30 00:48:01,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 76.6) internal successors, (1149), 15 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:01,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:01,051 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:01,051 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 282 flow. Second operand 15 states and 1149 transitions. [2023-08-30 00:48:01,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 881 flow [2023-08-30 00:48:01,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 803 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-08-30 00:48:01,057 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 449 flow [2023-08-30 00:48:01,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=449, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-08-30 00:48:01,058 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-08-30 00:48:01,058 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 449 flow [2023-08-30 00:48:01,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:01,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:01,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:01,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:01,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:01,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 524184273, now seen corresponding path program 3 times [2023-08-30 00:48:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267239750] [2023-08-30 00:48:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:01,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:01,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267239750] [2023-08-30 00:48:01,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267239750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:01,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748205476] [2023-08-30 00:48:01,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:48:01,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:01,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:01,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:01,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 00:48:01,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:48:01,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:01,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:48:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:01,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748205476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:02,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:02,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 00:48:02,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287938351] [2023-08-30 00:48:02,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:02,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:48:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:02,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:48:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:48:02,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:02,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 449 flow. Second operand has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:02,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:02,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:02,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:02,969 INFO L130 PetriNetUnfolder]: 160/318 cut-off events. [2023-08-30 00:48:02,970 INFO L131 PetriNetUnfolder]: For 1110/1110 co-relation queries the response was YES. [2023-08-30 00:48:02,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 318 events. 160/318 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1222 event pairs, 8 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1489. Up to 119 conditions per place. [2023-08-30 00:48:02,973 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 57 selfloop transitions, 34 changer transitions 28/119 dead transitions. [2023-08-30 00:48:02,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 1028 flow [2023-08-30 00:48:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:48:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:48:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1214 transitions. [2023-08-30 00:48:02,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262640449438202 [2023-08-30 00:48:02,976 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1214 transitions. [2023-08-30 00:48:02,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1214 transitions. [2023-08-30 00:48:02,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:02,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1214 transitions. [2023-08-30 00:48:02,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 75.875) internal successors, (1214), 16 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:02,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 178.0) internal successors, (3026), 17 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:02,984 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 178.0) internal successors, (3026), 17 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:02,984 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 449 flow. Second operand 16 states and 1214 transitions. [2023-08-30 00:48:02,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 1028 flow [2023-08-30 00:48:02,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 119 transitions, 949 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-30 00:48:02,990 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 546 flow [2023-08-30 00:48:02,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=546, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-08-30 00:48:02,991 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2023-08-30 00:48:02,991 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 546 flow [2023-08-30 00:48:02,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:02,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:02,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:02,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:03,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:03,197 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:03,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:03,197 INFO L85 PathProgramCache]: Analyzing trace with hash 40888079, now seen corresponding path program 4 times [2023-08-30 00:48:03,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:03,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010932306] [2023-08-30 00:48:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:03,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:03,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:03,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010932306] [2023-08-30 00:48:03,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010932306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:03,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697428572] [2023-08-30 00:48:03,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:48:03,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:03,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:03,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:03,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 00:48:03,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:48:03,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 00:48:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:03,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697428572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:03,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:03,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 00:48:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701805326] [2023-08-30 00:48:03,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:03,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:48:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:48:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:48:03,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:03,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 546 flow. Second operand has 21 states, 21 states have (on average 71.80952380952381) internal successors, (1508), 21 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:03,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:03,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:03,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:04,483 INFO L130 PetriNetUnfolder]: 206/393 cut-off events. [2023-08-30 00:48:04,483 INFO L131 PetriNetUnfolder]: For 1623/1623 co-relation queries the response was YES. [2023-08-30 00:48:04,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 393 events. 206/393 cut-off events. For 1623/1623 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1579 event pairs, 21 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1977. Up to 249 conditions per place. [2023-08-30 00:48:04,487 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 69 selfloop transitions, 22 changer transitions 27/118 dead transitions. [2023-08-30 00:48:04,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1138 flow [2023-08-30 00:48:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 00:48:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 00:48:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1131 transitions. [2023-08-30 00:48:04,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42359550561797754 [2023-08-30 00:48:04,490 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1131 transitions. [2023-08-30 00:48:04,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1131 transitions. [2023-08-30 00:48:04,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:04,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1131 transitions. [2023-08-30 00:48:04,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 75.4) internal successors, (1131), 15 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:04,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:04,498 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 178.0) internal successors, (2848), 16 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:04,498 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 546 flow. Second operand 15 states and 1131 transitions. [2023-08-30 00:48:04,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1138 flow [2023-08-30 00:48:04,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 1051 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 00:48:04,508 INFO L231 Difference]: Finished difference. Result has 94 places, 69 transitions, 674 flow [2023-08-30 00:48:04,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=674, PETRI_PLACES=94, PETRI_TRANSITIONS=69} [2023-08-30 00:48:04,509 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2023-08-30 00:48:04,509 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 69 transitions, 674 flow [2023-08-30 00:48:04,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 71.80952380952381) internal successors, (1508), 21 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:04,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:04,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:04,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:04,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 00:48:04,715 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:04,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 34449325, now seen corresponding path program 5 times [2023-08-30 00:48:04,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:04,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67178593] [2023-08-30 00:48:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:04,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67178593] [2023-08-30 00:48:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67178593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:04,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911165862] [2023-08-30 00:48:04,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:48:04,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:04,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:04,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 00:48:04,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:04,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:48:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:05,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:05,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911165862] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:05,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:05,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 00:48:05,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729268294] [2023-08-30 00:48:05,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:05,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 00:48:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 00:48:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-30 00:48:05,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:05,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 69 transitions, 674 flow. Second operand has 19 states, 19 states have (on average 71.84210526315789) internal successors, (1365), 19 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:05,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:05,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:05,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:06,375 INFO L130 PetriNetUnfolder]: 267/529 cut-off events. [2023-08-30 00:48:06,375 INFO L131 PetriNetUnfolder]: For 2880/2880 co-relation queries the response was YES. [2023-08-30 00:48:06,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 529 events. 267/529 cut-off events. For 2880/2880 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2449 event pairs, 11 based on Foata normal form. 5/534 useless extension candidates. Maximal degree in co-relation 2669. Up to 176 conditions per place. [2023-08-30 00:48:06,379 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 107 selfloop transitions, 56 changer transitions 20/183 dead transitions. [2023-08-30 00:48:06,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 183 transitions, 1679 flow [2023-08-30 00:48:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 00:48:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 00:48:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2115 transitions. [2023-08-30 00:48:06,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42435794542536115 [2023-08-30 00:48:06,385 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2115 transitions. [2023-08-30 00:48:06,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2115 transitions. [2023-08-30 00:48:06,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:06,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2115 transitions. [2023-08-30 00:48:06,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 75.53571428571429) internal successors, (2115), 28 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:06,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 178.0) internal successors, (5162), 29 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:06,397 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 178.0) internal successors, (5162), 29 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:06,397 INFO L175 Difference]: Start difference. First operand has 94 places, 69 transitions, 674 flow. Second operand 28 states and 2115 transitions. [2023-08-30 00:48:06,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 183 transitions, 1679 flow [2023-08-30 00:48:06,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1588 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-30 00:48:06,408 INFO L231 Difference]: Finished difference. Result has 118 places, 88 transitions, 968 flow [2023-08-30 00:48:06,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=968, PETRI_PLACES=118, PETRI_TRANSITIONS=88} [2023-08-30 00:48:06,409 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2023-08-30 00:48:06,409 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 88 transitions, 968 flow [2023-08-30 00:48:06,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 71.84210526315789) internal successors, (1365), 19 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:06,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:06,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:06,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:06,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:06,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:06,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1822229075, now seen corresponding path program 6 times [2023-08-30 00:48:06,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:06,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002948782] [2023-08-30 00:48:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:06,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:06,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:06,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002948782] [2023-08-30 00:48:06,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002948782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:06,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521239499] [2023-08-30 00:48:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:48:06,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:06,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:06,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:06,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 00:48:06,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:48:06,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:48:06,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:07,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:07,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521239499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:07,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:07,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 00:48:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860172717] [2023-08-30 00:48:07,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:07,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:48:07,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:48:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:48:07,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:07,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 88 transitions, 968 flow. Second operand has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:07,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:07,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:08,203 INFO L130 PetriNetUnfolder]: 259/506 cut-off events. [2023-08-30 00:48:08,204 INFO L131 PetriNetUnfolder]: For 3884/3884 co-relation queries the response was YES. [2023-08-30 00:48:08,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2978 conditions, 506 events. 259/506 cut-off events. For 3884/3884 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2252 event pairs, 18 based on Foata normal form. 1/507 useless extension candidates. Maximal degree in co-relation 2935. Up to 423 conditions per place. [2023-08-30 00:48:08,208 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 90 selfloop transitions, 26 changer transitions 8/124 dead transitions. [2023-08-30 00:48:08,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 124 transitions, 1450 flow [2023-08-30 00:48:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:48:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:48:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 898 transitions. [2023-08-30 00:48:08,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204119850187266 [2023-08-30 00:48:08,211 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 898 transitions. [2023-08-30 00:48:08,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 898 transitions. [2023-08-30 00:48:08,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:08,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 898 transitions. [2023-08-30 00:48:08,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 74.83333333333333) internal successors, (898), 12 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:08,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:08,216 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:08,216 INFO L175 Difference]: Start difference. First operand has 118 places, 88 transitions, 968 flow. Second operand 12 states and 898 transitions. [2023-08-30 00:48:08,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 124 transitions, 1450 flow [2023-08-30 00:48:08,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 1209 flow, removed 82 selfloop flow, removed 19 redundant places. [2023-08-30 00:48:08,231 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 898 flow [2023-08-30 00:48:08,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=898, PETRI_PLACES=110, PETRI_TRANSITIONS=95} [2023-08-30 00:48:08,232 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2023-08-30 00:48:08,232 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 898 flow [2023-08-30 00:48:08,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:08,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:08,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:08,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:08,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:08,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:08,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1023171265, now seen corresponding path program 7 times [2023-08-30 00:48:08,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:08,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355089449] [2023-08-30 00:48:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:08,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:08,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:08,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355089449] [2023-08-30 00:48:08,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355089449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:08,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968783247] [2023-08-30 00:48:08,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:48:08,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:08,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:08,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 00:48:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 00:48:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:08,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:09,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968783247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:09,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:09,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-08-30 00:48:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436199723] [2023-08-30 00:48:09,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:09,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:48:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:48:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:48:09,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 178 [2023-08-30 00:48:09,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 95 transitions, 898 flow. Second operand has 20 states, 20 states have (on average 64.9) internal successors, (1298), 20 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:09,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:09,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 178 [2023-08-30 00:48:09,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:10,659 INFO L130 PetriNetUnfolder]: 337/664 cut-off events. [2023-08-30 00:48:10,659 INFO L131 PetriNetUnfolder]: For 5069/5069 co-relation queries the response was YES. [2023-08-30 00:48:10,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3786 conditions, 664 events. 337/664 cut-off events. For 5069/5069 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3225 event pairs, 22 based on Foata normal form. 5/669 useless extension candidates. Maximal degree in co-relation 3747. Up to 349 conditions per place. [2023-08-30 00:48:10,664 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 118 selfloop transitions, 35 changer transitions 72/225 dead transitions. [2023-08-30 00:48:10,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 225 transitions, 2319 flow [2023-08-30 00:48:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:48:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:48:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2436 transitions. [2023-08-30 00:48:10,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801498127340824 [2023-08-30 00:48:10,670 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2436 transitions. [2023-08-30 00:48:10,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2436 transitions. [2023-08-30 00:48:10,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:10,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2436 transitions. [2023-08-30 00:48:10,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.66666666666667) internal successors, (2436), 36 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:10,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:10,696 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:10,697 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 898 flow. Second operand 36 states and 2436 transitions. [2023-08-30 00:48:10,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 225 transitions, 2319 flow [2023-08-30 00:48:10,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 2211 flow, removed 34 selfloop flow, removed 9 redundant places. [2023-08-30 00:48:10,718 INFO L231 Difference]: Finished difference. Result has 154 places, 104 transitions, 1076 flow [2023-08-30 00:48:10,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1076, PETRI_PLACES=154, PETRI_TRANSITIONS=104} [2023-08-30 00:48:10,719 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2023-08-30 00:48:10,719 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 104 transitions, 1076 flow [2023-08-30 00:48:10,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.9) internal successors, (1298), 20 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:10,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:10,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:10,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:10,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 00:48:10,926 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:10,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash 751769471, now seen corresponding path program 8 times [2023-08-30 00:48:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874404866] [2023-08-30 00:48:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:10,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:11,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:11,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874404866] [2023-08-30 00:48:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874404866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472040109] [2023-08-30 00:48:11,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:48:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:11,085 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:11,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 00:48:11,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:11,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:48:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:11,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472040109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:11,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:11,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 00:48:11,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832791561] [2023-08-30 00:48:11,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:11,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:48:11,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:48:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:48:11,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:11,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 104 transitions, 1076 flow. Second operand has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:11,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:11,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:11,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:12,213 INFO L130 PetriNetUnfolder]: 277/541 cut-off events. [2023-08-30 00:48:12,214 INFO L131 PetriNetUnfolder]: For 8538/8538 co-relation queries the response was YES. [2023-08-30 00:48:12,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3693 conditions, 541 events. 277/541 cut-off events. For 8538/8538 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2446 event pairs, 27 based on Foata normal form. 1/542 useless extension candidates. Maximal degree in co-relation 3636. Up to 437 conditions per place. [2023-08-30 00:48:12,219 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 103 selfloop transitions, 29 changer transitions 5/137 dead transitions. [2023-08-30 00:48:12,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 137 transitions, 1614 flow [2023-08-30 00:48:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 00:48:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 00:48:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 898 transitions. [2023-08-30 00:48:12,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204119850187266 [2023-08-30 00:48:12,221 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 898 transitions. [2023-08-30 00:48:12,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 898 transitions. [2023-08-30 00:48:12,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:12,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 898 transitions. [2023-08-30 00:48:12,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 74.83333333333333) internal successors, (898), 12 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:12,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:12,226 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 178.0) internal successors, (2314), 13 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:12,226 INFO L175 Difference]: Start difference. First operand has 154 places, 104 transitions, 1076 flow. Second operand 12 states and 898 transitions. [2023-08-30 00:48:12,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 137 transitions, 1614 flow [2023-08-30 00:48:12,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1309 flow, removed 101 selfloop flow, removed 28 redundant places. [2023-08-30 00:48:12,252 INFO L231 Difference]: Finished difference. Result has 126 places, 110 transitions, 978 flow [2023-08-30 00:48:12,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=978, PETRI_PLACES=126, PETRI_TRANSITIONS=110} [2023-08-30 00:48:12,253 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2023-08-30 00:48:12,253 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 110 transitions, 978 flow [2023-08-30 00:48:12,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.86363636363636) internal successors, (1581), 22 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:12,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:12,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:12,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 00:48:12,459 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:12,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:12,459 INFO L85 PathProgramCache]: Analyzing trace with hash 669402161, now seen corresponding path program 9 times [2023-08-30 00:48:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:12,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430872137] [2023-08-30 00:48:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:12,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430872137] [2023-08-30 00:48:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430872137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669907238] [2023-08-30 00:48:12,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:48:12,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:12,621 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 00:48:12,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:48:12,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:12,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 00:48:12,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:12,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:13,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669907238] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:13,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:13,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 00:48:13,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288022250] [2023-08-30 00:48:13,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:13,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:48:13,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:13,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:48:13,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:48:13,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:13,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 110 transitions, 978 flow. Second operand has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:13,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:13,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:13,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:13,796 INFO L130 PetriNetUnfolder]: 279/539 cut-off events. [2023-08-30 00:48:13,797 INFO L131 PetriNetUnfolder]: For 6132/6132 co-relation queries the response was YES. [2023-08-30 00:48:13,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 539 events. 279/539 cut-off events. For 6132/6132 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2394 event pairs, 27 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 3237. Up to 429 conditions per place. [2023-08-30 00:48:13,802 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 98 selfloop transitions, 34 changer transitions 12/144 dead transitions. [2023-08-30 00:48:13,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 144 transitions, 1507 flow [2023-08-30 00:48:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 00:48:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 00:48:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1047 transitions. [2023-08-30 00:48:13,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42014446227929375 [2023-08-30 00:48:13,804 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1047 transitions. [2023-08-30 00:48:13,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1047 transitions. [2023-08-30 00:48:13,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:13,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1047 transitions. [2023-08-30 00:48:13,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 74.78571428571429) internal successors, (1047), 14 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:13,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 178.0) internal successors, (2670), 15 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:13,810 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 178.0) internal successors, (2670), 15 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:13,810 INFO L175 Difference]: Start difference. First operand has 126 places, 110 transitions, 978 flow. Second operand 14 states and 1047 transitions. [2023-08-30 00:48:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 144 transitions, 1507 flow [2023-08-30 00:48:13,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 144 transitions, 1435 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-30 00:48:13,825 INFO L231 Difference]: Finished difference. Result has 132 places, 111 transitions, 1003 flow [2023-08-30 00:48:13,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1003, PETRI_PLACES=132, PETRI_TRANSITIONS=111} [2023-08-30 00:48:13,826 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2023-08-30 00:48:13,826 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 111 transitions, 1003 flow [2023-08-30 00:48:13,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:13,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:13,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:13,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:14,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 00:48:14,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:14,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:14,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1321223506, now seen corresponding path program 10 times [2023-08-30 00:48:14,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:14,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242932203] [2023-08-30 00:48:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:14,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242932203] [2023-08-30 00:48:14,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242932203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:14,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549238436] [2023-08-30 00:48:14,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:48:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:14,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:14,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 00:48:14,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:48:14,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:48:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:14,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:14,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549238436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:14,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 00:48:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676713063] [2023-08-30 00:48:14,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:14,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 00:48:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 00:48:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-30 00:48:14,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:14,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 111 transitions, 1003 flow. Second operand has 23 states, 23 states have (on average 71.69565217391305) internal successors, (1649), 23 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:14,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:14,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:14,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:15,364 INFO L130 PetriNetUnfolder]: 333/645 cut-off events. [2023-08-30 00:48:15,364 INFO L131 PetriNetUnfolder]: For 7831/7831 co-relation queries the response was YES. [2023-08-30 00:48:15,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4105 conditions, 645 events. 333/645 cut-off events. For 7831/7831 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3074 event pairs, 21 based on Foata normal form. 3/646 useless extension candidates. Maximal degree in co-relation 4060. Up to 318 conditions per place. [2023-08-30 00:48:15,370 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 84 selfloop transitions, 70 changer transitions 42/196 dead transitions. [2023-08-30 00:48:15,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 196 transitions, 2129 flow [2023-08-30 00:48:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 00:48:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 00:48:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1734 transitions. [2023-08-30 00:48:15,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4235466536394724 [2023-08-30 00:48:15,374 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1734 transitions. [2023-08-30 00:48:15,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1734 transitions. [2023-08-30 00:48:15,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:15,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1734 transitions. [2023-08-30 00:48:15,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 75.3913043478261) internal successors, (1734), 23 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:15,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 178.0) internal successors, (4272), 24 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:15,381 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 178.0) internal successors, (4272), 24 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:15,381 INFO L175 Difference]: Start difference. First operand has 132 places, 111 transitions, 1003 flow. Second operand 23 states and 1734 transitions. [2023-08-30 00:48:15,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 196 transitions, 2129 flow [2023-08-30 00:48:15,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 196 transitions, 1937 flow, removed 56 selfloop flow, removed 15 redundant places. [2023-08-30 00:48:15,402 INFO L231 Difference]: Finished difference. Result has 149 places, 118 transitions, 1169 flow [2023-08-30 00:48:15,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1169, PETRI_PLACES=149, PETRI_TRANSITIONS=118} [2023-08-30 00:48:15,402 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2023-08-30 00:48:15,403 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 118 transitions, 1169 flow [2023-08-30 00:48:15,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 71.69565217391305) internal successors, (1649), 23 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:15,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:15,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:15,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 00:48:15,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:15,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1198803054, now seen corresponding path program 11 times [2023-08-30 00:48:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:15,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182482455] [2023-08-30 00:48:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:15,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:15,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182482455] [2023-08-30 00:48:15,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182482455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256690802] [2023-08-30 00:48:15,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:48:15,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:15,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:15,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 00:48:15,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:48:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:48:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:16,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256690802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:16,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:16,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 00:48:16,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591980066] [2023-08-30 00:48:16,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 00:48:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 00:48:16,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-30 00:48:16,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:16,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 118 transitions, 1169 flow. Second operand has 23 states, 23 states have (on average 71.65217391304348) internal successors, (1648), 23 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:16,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:16,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:16,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:17,138 INFO L130 PetriNetUnfolder]: 330/662 cut-off events. [2023-08-30 00:48:17,139 INFO L131 PetriNetUnfolder]: For 12675/12675 co-relation queries the response was YES. [2023-08-30 00:48:17,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4584 conditions, 662 events. 330/662 cut-off events. For 12675/12675 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3268 event pairs, 19 based on Foata normal form. 3/663 useless extension candidates. Maximal degree in co-relation 4532. Up to 330 conditions per place. [2023-08-30 00:48:17,144 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 110 selfloop transitions, 87 changer transitions 16/213 dead transitions. [2023-08-30 00:48:17,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 2386 flow [2023-08-30 00:48:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 00:48:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 00:48:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2029 transitions. [2023-08-30 00:48:17,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422180607573866 [2023-08-30 00:48:17,150 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2029 transitions. [2023-08-30 00:48:17,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2029 transitions. [2023-08-30 00:48:17,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:17,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2029 transitions. [2023-08-30 00:48:17,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 75.14814814814815) internal successors, (2029), 27 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:17,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 178.0) internal successors, (4984), 28 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:17,158 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 178.0) internal successors, (4984), 28 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:17,158 INFO L175 Difference]: Start difference. First operand has 149 places, 118 transitions, 1169 flow. Second operand 27 states and 2029 transitions. [2023-08-30 00:48:17,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 2386 flow [2023-08-30 00:48:17,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 213 transitions, 1995 flow, removed 131 selfloop flow, removed 17 redundant places. [2023-08-30 00:48:17,182 INFO L231 Difference]: Finished difference. Result has 157 places, 137 transitions, 1421 flow [2023-08-30 00:48:17,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1421, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2023-08-30 00:48:17,182 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2023-08-30 00:48:17,182 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 1421 flow [2023-08-30 00:48:17,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 71.65217391304348) internal successors, (1648), 23 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:17,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:17,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:17,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:17,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 00:48:17,388 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:17,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1281170364, now seen corresponding path program 12 times [2023-08-30 00:48:17,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:17,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015284288] [2023-08-30 00:48:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:17,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:17,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015284288] [2023-08-30 00:48:17,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015284288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:17,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96220747] [2023-08-30 00:48:17,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:48:17,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:17,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:17,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 00:48:17,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 00:48:17,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:48:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:17,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96220747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:18,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:18,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 00:48:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342083205] [2023-08-30 00:48:18,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 00:48:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 00:48:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-08-30 00:48:18,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:18,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 1421 flow. Second operand has 25 states, 25 states have (on average 71.84) internal successors, (1796), 25 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:18,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:18,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:18,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:20,834 INFO L130 PetriNetUnfolder]: 508/988 cut-off events. [2023-08-30 00:48:20,834 INFO L131 PetriNetUnfolder]: For 16539/16539 co-relation queries the response was YES. [2023-08-30 00:48:20,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6827 conditions, 988 events. 508/988 cut-off events. For 16539/16539 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5279 event pairs, 14 based on Foata normal form. 3/989 useless extension candidates. Maximal degree in co-relation 6777. Up to 284 conditions per place. [2023-08-30 00:48:20,843 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 126 selfloop transitions, 149 changer transitions 30/305 dead transitions. [2023-08-30 00:48:20,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 305 transitions, 3577 flow [2023-08-30 00:48:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 00:48:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 00:48:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2853 transitions. [2023-08-30 00:48:20,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217918391484329 [2023-08-30 00:48:20,848 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2853 transitions. [2023-08-30 00:48:20,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2853 transitions. [2023-08-30 00:48:20,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:20,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2853 transitions. [2023-08-30 00:48:20,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 75.07894736842105) internal successors, (2853), 38 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:20,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 178.0) internal successors, (6942), 39 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:20,860 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 178.0) internal successors, (6942), 39 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:20,860 INFO L175 Difference]: Start difference. First operand has 157 places, 137 transitions, 1421 flow. Second operand 38 states and 2853 transitions. [2023-08-30 00:48:20,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 305 transitions, 3577 flow [2023-08-30 00:48:20,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 305 transitions, 3194 flow, removed 122 selfloop flow, removed 12 redundant places. [2023-08-30 00:48:20,920 INFO L231 Difference]: Finished difference. Result has 186 places, 198 transitions, 2411 flow [2023-08-30 00:48:20,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2411, PETRI_PLACES=186, PETRI_TRANSITIONS=198} [2023-08-30 00:48:20,921 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2023-08-30 00:48:20,921 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 198 transitions, 2411 flow [2023-08-30 00:48:20,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.84) internal successors, (1796), 25 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:20,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:20,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:20,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:21,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:21,128 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:21,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1682099248, now seen corresponding path program 13 times [2023-08-30 00:48:21,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:21,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689791671] [2023-08-30 00:48:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:21,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:21,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:21,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689791671] [2023-08-30 00:48:21,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689791671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:21,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173542451] [2023-08-30 00:48:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:48:21,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:21,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:21,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 00:48:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:21,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:48:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:21,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173542451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:21,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:21,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-30 00:48:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250437146] [2023-08-30 00:48:21,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 00:48:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 00:48:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-08-30 00:48:21,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:21,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 198 transitions, 2411 flow. Second operand has 23 states, 23 states have (on average 71.73913043478261) internal successors, (1650), 23 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:21,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:21,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:21,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:23,062 INFO L130 PetriNetUnfolder]: 648/1257 cut-off events. [2023-08-30 00:48:23,062 INFO L131 PetriNetUnfolder]: For 18421/18421 co-relation queries the response was YES. [2023-08-30 00:48:23,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9294 conditions, 1257 events. 648/1257 cut-off events. For 18421/18421 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7181 event pairs, 17 based on Foata normal form. 12/1267 useless extension candidates. Maximal degree in co-relation 9237. Up to 371 conditions per place. [2023-08-30 00:48:23,072 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 135 selfloop transitions, 136 changer transitions 89/360 dead transitions. [2023-08-30 00:48:23,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 360 transitions, 4803 flow [2023-08-30 00:48:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 00:48:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 00:48:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3069 transitions. [2023-08-30 00:48:23,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42052617155385036 [2023-08-30 00:48:23,081 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3069 transitions. [2023-08-30 00:48:23,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3069 transitions. [2023-08-30 00:48:23,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:23,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3069 transitions. [2023-08-30 00:48:23,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 74.85365853658537) internal successors, (3069), 41 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:23,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 178.0) internal successors, (7476), 42 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:23,094 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 178.0) internal successors, (7476), 42 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:23,094 INFO L175 Difference]: Start difference. First operand has 186 places, 198 transitions, 2411 flow. Second operand 41 states and 3069 transitions. [2023-08-30 00:48:23,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 360 transitions, 4803 flow [2023-08-30 00:48:23,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 360 transitions, 3897 flow, removed 325 selfloop flow, removed 25 redundant places. [2023-08-30 00:48:23,144 INFO L231 Difference]: Finished difference. Result has 209 places, 196 transitions, 2090 flow [2023-08-30 00:48:23,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2090, PETRI_PLACES=209, PETRI_TRANSITIONS=196} [2023-08-30 00:48:23,145 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 180 predicate places. [2023-08-30 00:48:23,145 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 196 transitions, 2090 flow [2023-08-30 00:48:23,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 71.73913043478261) internal successors, (1650), 23 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:23,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:23,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:23,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:23,351 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:23,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1957327264, now seen corresponding path program 14 times [2023-08-30 00:48:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:23,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807810280] [2023-08-30 00:48:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:23,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:23,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807810280] [2023-08-30 00:48:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807810280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:23,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993376142] [2023-08-30 00:48:23,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:48:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:23,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:23,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 00:48:23,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:23,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:23,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:48:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:23,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:24,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993376142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:24,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 00:48:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015775516] [2023-08-30 00:48:24,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 00:48:24,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 00:48:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-30 00:48:24,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:24,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 196 transitions, 2090 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:24,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:24,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:24,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:26,803 INFO L130 PetriNetUnfolder]: 608/1327 cut-off events. [2023-08-30 00:48:26,803 INFO L131 PetriNetUnfolder]: For 24755/24755 co-relation queries the response was YES. [2023-08-30 00:48:26,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9121 conditions, 1327 events. 608/1327 cut-off events. For 24755/24755 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8540 event pairs, 14 based on Foata normal form. 12/1337 useless extension candidates. Maximal degree in co-relation 9061. Up to 311 conditions per place. [2023-08-30 00:48:26,814 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 167 selfloop transitions, 198 changer transitions 34/399 dead transitions. [2023-08-30 00:48:26,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 399 transitions, 4870 flow [2023-08-30 00:48:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 00:48:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 00:48:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3789 transitions. [2023-08-30 00:48:26,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173826834104428 [2023-08-30 00:48:26,819 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3789 transitions. [2023-08-30 00:48:26,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3789 transitions. [2023-08-30 00:48:26,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:26,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3789 transitions. [2023-08-30 00:48:26,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 74.29411764705883) internal successors, (3789), 51 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:26,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:26,832 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:26,833 INFO L175 Difference]: Start difference. First operand has 209 places, 196 transitions, 2090 flow. Second operand 51 states and 3789 transitions. [2023-08-30 00:48:26,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 399 transitions, 4870 flow [2023-08-30 00:48:26,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 399 transitions, 4089 flow, removed 269 selfloop flow, removed 32 redundant places. [2023-08-30 00:48:26,923 INFO L231 Difference]: Finished difference. Result has 226 places, 263 transitions, 3135 flow [2023-08-30 00:48:26,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3135, PETRI_PLACES=226, PETRI_TRANSITIONS=263} [2023-08-30 00:48:26,924 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 197 predicate places. [2023-08-30 00:48:26,924 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 263 transitions, 3135 flow [2023-08-30 00:48:26,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:26,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:26,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:26,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 00:48:27,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:27,125 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:27,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:27,126 INFO L85 PathProgramCache]: Analyzing trace with hash -618701680, now seen corresponding path program 15 times [2023-08-30 00:48:27,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:27,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096250814] [2023-08-30 00:48:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:27,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096250814] [2023-08-30 00:48:27,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096250814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:27,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976134058] [2023-08-30 00:48:27,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:48:27,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:27,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:27,290 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:27,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 00:48:27,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:48:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:48:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:27,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976134058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:27,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:27,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 00:48:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583285945] [2023-08-30 00:48:27,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 00:48:27,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 00:48:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-08-30 00:48:28,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:28,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 263 transitions, 3135 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:28,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:28,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:28,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:29,528 INFO L130 PetriNetUnfolder]: 599/1260 cut-off events. [2023-08-30 00:48:29,528 INFO L131 PetriNetUnfolder]: For 18427/18427 co-relation queries the response was YES. [2023-08-30 00:48:29,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8535 conditions, 1260 events. 599/1260 cut-off events. For 18427/18427 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7722 event pairs, 16 based on Foata normal form. 10/1268 useless extension candidates. Maximal degree in co-relation 8476. Up to 326 conditions per place. [2023-08-30 00:48:29,537 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 165 selfloop transitions, 146 changer transitions 67/378 dead transitions. [2023-08-30 00:48:29,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 378 transitions, 4732 flow [2023-08-30 00:48:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 00:48:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 00:48:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3115 transitions. [2023-08-30 00:48:29,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-30 00:48:29,541 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3115 transitions. [2023-08-30 00:48:29,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3115 transitions. [2023-08-30 00:48:29,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:29,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3115 transitions. [2023-08-30 00:48:29,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 74.16666666666667) internal successors, (3115), 42 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:29,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 178.0) internal successors, (7654), 43 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:29,551 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 178.0) internal successors, (7654), 43 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:29,551 INFO L175 Difference]: Start difference. First operand has 226 places, 263 transitions, 3135 flow. Second operand 42 states and 3115 transitions. [2023-08-30 00:48:29,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 378 transitions, 4732 flow [2023-08-30 00:48:29,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 378 transitions, 4038 flow, removed 266 selfloop flow, removed 23 redundant places. [2023-08-30 00:48:29,628 INFO L231 Difference]: Finished difference. Result has 244 places, 238 transitions, 2613 flow [2023-08-30 00:48:29,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2613, PETRI_PLACES=244, PETRI_TRANSITIONS=238} [2023-08-30 00:48:29,628 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2023-08-30 00:48:29,628 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 238 transitions, 2613 flow [2023-08-30 00:48:29,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:29,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:29,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:29,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:29,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 00:48:29,833 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:29,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1874959954, now seen corresponding path program 16 times [2023-08-30 00:48:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:29,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605811090] [2023-08-30 00:48:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:29,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:29,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605811090] [2023-08-30 00:48:29,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605811090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608348708] [2023-08-30 00:48:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:48:29,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:29,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:29,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:30,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 00:48:30,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:48:30,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:48:30,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:30,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608348708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:30,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:30,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-30 00:48:30,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126579860] [2023-08-30 00:48:30,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:30,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:48:30,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:30,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:48:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:48:30,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:30,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 238 transitions, 2613 flow. Second operand has 24 states, 24 states have (on average 71.70833333333333) internal successors, (1721), 24 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:30,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:30,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:30,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:31,868 INFO L130 PetriNetUnfolder]: 648/1363 cut-off events. [2023-08-30 00:48:31,868 INFO L131 PetriNetUnfolder]: For 19994/19994 co-relation queries the response was YES. [2023-08-30 00:48:31,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8551 conditions, 1363 events. 648/1363 cut-off events. For 19994/19994 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8461 event pairs, 27 based on Foata normal form. 10/1371 useless extension candidates. Maximal degree in co-relation 8492. Up to 501 conditions per place. [2023-08-30 00:48:31,877 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 212 selfloop transitions, 145 changer transitions 27/384 dead transitions. [2023-08-30 00:48:31,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 384 transitions, 4830 flow [2023-08-30 00:48:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 00:48:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 00:48:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2614 transitions. [2023-08-30 00:48:31,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41958266452648474 [2023-08-30 00:48:31,882 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2614 transitions. [2023-08-30 00:48:31,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2614 transitions. [2023-08-30 00:48:31,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:31,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2614 transitions. [2023-08-30 00:48:31,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.68571428571428) internal successors, (2614), 35 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:31,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:31,890 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:31,890 INFO L175 Difference]: Start difference. First operand has 244 places, 238 transitions, 2613 flow. Second operand 35 states and 2614 transitions. [2023-08-30 00:48:31,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 384 transitions, 4830 flow [2023-08-30 00:48:31,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 384 transitions, 4387 flow, removed 78 selfloop flow, removed 35 redundant places. [2023-08-30 00:48:31,957 INFO L231 Difference]: Finished difference. Result has 231 places, 268 transitions, 3187 flow [2023-08-30 00:48:31,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3187, PETRI_PLACES=231, PETRI_TRANSITIONS=268} [2023-08-30 00:48:31,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2023-08-30 00:48:31,958 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 268 transitions, 3187 flow [2023-08-30 00:48:31,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 71.70833333333333) internal successors, (1721), 24 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:31,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:31,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:31,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 00:48:32,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:32,167 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:32,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1683924946, now seen corresponding path program 17 times [2023-08-30 00:48:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:32,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120937588] [2023-08-30 00:48:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:32,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:32,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120937588] [2023-08-30 00:48:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120937588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833781261] [2023-08-30 00:48:32,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:48:32,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:32,343 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:32,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 00:48:32,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:48:32,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:32,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:48:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:32,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:32,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833781261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:32,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 00:48:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171511068] [2023-08-30 00:48:32,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:48:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:48:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:48:32,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:32,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 268 transitions, 3187 flow. Second operand has 22 states, 22 states have (on average 71.68181818181819) internal successors, (1577), 22 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:32,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:32,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:32,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:34,059 INFO L130 PetriNetUnfolder]: 810/1757 cut-off events. [2023-08-30 00:48:34,060 INFO L131 PetriNetUnfolder]: For 37464/37464 co-relation queries the response was YES. [2023-08-30 00:48:34,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11933 conditions, 1757 events. 810/1757 cut-off events. For 37464/37464 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11942 event pairs, 35 based on Foata normal form. 14/1771 useless extension candidates. Maximal degree in co-relation 11871. Up to 838 conditions per place. [2023-08-30 00:48:34,072 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 270 selfloop transitions, 144 changer transitions 45/459 dead transitions. [2023-08-30 00:48:34,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 459 transitions, 6369 flow [2023-08-30 00:48:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 00:48:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 00:48:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2333 transitions. [2023-08-30 00:48:34,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42279811525915184 [2023-08-30 00:48:34,079 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2333 transitions. [2023-08-30 00:48:34,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2333 transitions. [2023-08-30 00:48:34,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:34,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2333 transitions. [2023-08-30 00:48:34,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 75.25806451612904) internal successors, (2333), 31 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:34,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 178.0) internal successors, (5696), 32 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:34,110 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 178.0) internal successors, (5696), 32 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:34,110 INFO L175 Difference]: Start difference. First operand has 231 places, 268 transitions, 3187 flow. Second operand 31 states and 2333 transitions. [2023-08-30 00:48:34,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 459 transitions, 6369 flow [2023-08-30 00:48:34,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 459 transitions, 5957 flow, removed 150 selfloop flow, removed 19 redundant places. [2023-08-30 00:48:34,225 INFO L231 Difference]: Finished difference. Result has 250 places, 318 transitions, 4130 flow [2023-08-30 00:48:34,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4130, PETRI_PLACES=250, PETRI_TRANSITIONS=318} [2023-08-30 00:48:34,226 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2023-08-30 00:48:34,226 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 318 transitions, 4130 flow [2023-08-30 00:48:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.68181818181819) internal successors, (1577), 22 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:34,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:34,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:34,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 00:48:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:34,431 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:34,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1919277674, now seen corresponding path program 18 times [2023-08-30 00:48:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:34,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329330383] [2023-08-30 00:48:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:34,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:34,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329330383] [2023-08-30 00:48:34,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329330383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:34,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319076725] [2023-08-30 00:48:34,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:48:34,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:34,727 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:34,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 00:48:34,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:48:34,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:34,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:48:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:35,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:35,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319076725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:35,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:35,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-30 00:48:35,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274154568] [2023-08-30 00:48:35,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:35,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:48:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:48:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:48:35,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 178 [2023-08-30 00:48:35,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 318 transitions, 4130 flow. Second operand has 26 states, 26 states have (on average 64.6923076923077) internal successors, (1682), 26 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:35,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:35,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 178 [2023-08-30 00:48:35,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:38,713 INFO L130 PetriNetUnfolder]: 841/1781 cut-off events. [2023-08-30 00:48:38,713 INFO L131 PetriNetUnfolder]: For 45299/45299 co-relation queries the response was YES. [2023-08-30 00:48:38,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13211 conditions, 1781 events. 841/1781 cut-off events. For 45299/45299 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11798 event pairs, 34 based on Foata normal form. 5/1786 useless extension candidates. Maximal degree in co-relation 13138. Up to 944 conditions per place. [2023-08-30 00:48:38,727 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 310 selfloop transitions, 121 changer transitions 21/452 dead transitions. [2023-08-30 00:48:38,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 452 transitions, 6392 flow [2023-08-30 00:48:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 00:48:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 00:48:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3002 transitions. [2023-08-30 00:48:38,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37478152309612983 [2023-08-30 00:48:38,731 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3002 transitions. [2023-08-30 00:48:38,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3002 transitions. [2023-08-30 00:48:38,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:38,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3002 transitions. [2023-08-30 00:48:38,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 66.71111111111111) internal successors, (3002), 45 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:38,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 178.0) internal successors, (8188), 46 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:38,741 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 178.0) internal successors, (8188), 46 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:38,741 INFO L175 Difference]: Start difference. First operand has 250 places, 318 transitions, 4130 flow. Second operand 45 states and 3002 transitions. [2023-08-30 00:48:38,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 452 transitions, 6392 flow [2023-08-30 00:48:38,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 452 transitions, 5910 flow, removed 204 selfloop flow, removed 21 redundant places. [2023-08-30 00:48:38,931 INFO L231 Difference]: Finished difference. Result has 281 places, 359 transitions, 4775 flow [2023-08-30 00:48:38,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4775, PETRI_PLACES=281, PETRI_TRANSITIONS=359} [2023-08-30 00:48:38,932 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 252 predicate places. [2023-08-30 00:48:38,932 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 359 transitions, 4775 flow [2023-08-30 00:48:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 64.6923076923077) internal successors, (1682), 26 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:38,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:38,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:38,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:39,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:39,138 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:39,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1517919016, now seen corresponding path program 19 times [2023-08-30 00:48:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636494162] [2023-08-30 00:48:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:39,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636494162] [2023-08-30 00:48:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636494162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290010395] [2023-08-30 00:48:39,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:48:39,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:39,292 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:39,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 00:48:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 00:48:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:39,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:39,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290010395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:39,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:39,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 00:48:39,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698330855] [2023-08-30 00:48:39,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:39,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:48:39,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:48:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:48:39,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:39,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 359 transitions, 4775 flow. Second operand has 22 states, 22 states have (on average 71.77272727272727) internal successors, (1579), 22 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:39,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:39,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:39,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:41,176 INFO L130 PetriNetUnfolder]: 979/2082 cut-off events. [2023-08-30 00:48:41,176 INFO L131 PetriNetUnfolder]: For 55787/55787 co-relation queries the response was YES. [2023-08-30 00:48:41,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16372 conditions, 2082 events. 979/2082 cut-off events. For 55787/55787 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14404 event pairs, 58 based on Foata normal form. 11/2093 useless extension candidates. Maximal degree in co-relation 16291. Up to 1356 conditions per place. [2023-08-30 00:48:41,191 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 354 selfloop transitions, 98 changer transitions 41/493 dead transitions. [2023-08-30 00:48:41,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 493 transitions, 7613 flow [2023-08-30 00:48:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 00:48:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 00:48:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2411 transitions. [2023-08-30 00:48:41,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42327949438202245 [2023-08-30 00:48:41,199 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2411 transitions. [2023-08-30 00:48:41,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2411 transitions. [2023-08-30 00:48:41,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:41,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2411 transitions. [2023-08-30 00:48:41,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 75.34375) internal successors, (2411), 32 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:41,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 178.0) internal successors, (5874), 33 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:41,211 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 178.0) internal successors, (5874), 33 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:41,211 INFO L175 Difference]: Start difference. First operand has 281 places, 359 transitions, 4775 flow. Second operand 32 states and 2411 transitions. [2023-08-30 00:48:41,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 493 transitions, 7613 flow [2023-08-30 00:48:41,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 493 transitions, 7011 flow, removed 271 selfloop flow, removed 15 redundant places. [2023-08-30 00:48:41,412 INFO L231 Difference]: Finished difference. Result has 304 places, 373 transitions, 5159 flow [2023-08-30 00:48:41,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5159, PETRI_PLACES=304, PETRI_TRANSITIONS=373} [2023-08-30 00:48:41,413 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 275 predicate places. [2023-08-30 00:48:41,413 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 373 transitions, 5159 flow [2023-08-30 00:48:41,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.77272727272727) internal successors, (1579), 22 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:41,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:41,414 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:41,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:41,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 00:48:41,618 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:41,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash 422533810, now seen corresponding path program 20 times [2023-08-30 00:48:41,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:41,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724994741] [2023-08-30 00:48:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:41,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:41,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724994741] [2023-08-30 00:48:41,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724994741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:41,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995038332] [2023-08-30 00:48:41,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:48:41,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:41,789 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:41,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 00:48:41,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:41,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:48:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:42,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995038332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:42,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:42,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 00:48:42,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422629967] [2023-08-30 00:48:42,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:42,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 00:48:42,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 00:48:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2023-08-30 00:48:42,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:42,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 373 transitions, 5159 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:42,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:42,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:42,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:44,317 INFO L130 PetriNetUnfolder]: 1065/2331 cut-off events. [2023-08-30 00:48:44,317 INFO L131 PetriNetUnfolder]: For 78817/78817 co-relation queries the response was YES. [2023-08-30 00:48:44,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19234 conditions, 2331 events. 1065/2331 cut-off events. For 78817/78817 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17043 event pairs, 36 based on Foata normal form. 8/2337 useless extension candidates. Maximal degree in co-relation 19142. Up to 970 conditions per place. [2023-08-30 00:48:44,333 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 335 selfloop transitions, 154 changer transitions 26/515 dead transitions. [2023-08-30 00:48:44,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 515 transitions, 8252 flow [2023-08-30 00:48:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:48:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:48:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2680 transitions. [2023-08-30 00:48:44,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418227215980025 [2023-08-30 00:48:44,336 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2680 transitions. [2023-08-30 00:48:44,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2680 transitions. [2023-08-30 00:48:44,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:44,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2680 transitions. [2023-08-30 00:48:44,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 74.44444444444444) internal successors, (2680), 36 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:44,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:44,343 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:44,343 INFO L175 Difference]: Start difference. First operand has 304 places, 373 transitions, 5159 flow. Second operand 36 states and 2680 transitions. [2023-08-30 00:48:44,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 515 transitions, 8252 flow [2023-08-30 00:48:44,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 515 transitions, 7509 flow, removed 336 selfloop flow, removed 20 redundant places. [2023-08-30 00:48:44,570 INFO L231 Difference]: Finished difference. Result has 313 places, 413 transitions, 6087 flow [2023-08-30 00:48:44,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6087, PETRI_PLACES=313, PETRI_TRANSITIONS=413} [2023-08-30 00:48:44,570 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2023-08-30 00:48:44,570 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 413 transitions, 6087 flow [2023-08-30 00:48:44,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:44,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:44,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:44,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:44,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 00:48:44,771 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:44,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2141472162, now seen corresponding path program 21 times [2023-08-30 00:48:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:44,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201003814] [2023-08-30 00:48:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:44,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:44,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:44,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201003814] [2023-08-30 00:48:44,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201003814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:44,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298363668] [2023-08-30 00:48:44,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:48:44,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:44,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:44,910 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:44,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 00:48:44,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:48:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 00:48:44,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:45,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:45,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298363668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:45,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:45,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 00:48:45,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609423796] [2023-08-30 00:48:45,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:45,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 00:48:45,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 00:48:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-08-30 00:48:45,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:45,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 413 transitions, 6087 flow. Second operand has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:45,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:45,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:45,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:47,003 INFO L130 PetriNetUnfolder]: 1055/2257 cut-off events. [2023-08-30 00:48:47,004 INFO L131 PetriNetUnfolder]: For 75799/75799 co-relation queries the response was YES. [2023-08-30 00:48:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18654 conditions, 2257 events. 1055/2257 cut-off events. For 75799/75799 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15999 event pairs, 36 based on Foata normal form. 13/2268 useless extension candidates. Maximal degree in co-relation 18561. Up to 1001 conditions per place. [2023-08-30 00:48:47,020 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 317 selfloop transitions, 112 changer transitions 60/489 dead transitions. [2023-08-30 00:48:47,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 489 transitions, 7873 flow [2023-08-30 00:48:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 00:48:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 00:48:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1930 transitions. [2023-08-30 00:48:47,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170267934312878 [2023-08-30 00:48:47,022 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1930 transitions. [2023-08-30 00:48:47,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1930 transitions. [2023-08-30 00:48:47,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:47,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1930 transitions. [2023-08-30 00:48:47,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.23076923076923) internal successors, (1930), 26 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:47,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 178.0) internal successors, (4806), 27 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:47,028 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 178.0) internal successors, (4806), 27 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:47,029 INFO L175 Difference]: Start difference. First operand has 313 places, 413 transitions, 6087 flow. Second operand 26 states and 1930 transitions. [2023-08-30 00:48:47,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 489 transitions, 7873 flow [2023-08-30 00:48:47,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 489 transitions, 7201 flow, removed 289 selfloop flow, removed 17 redundant places. [2023-08-30 00:48:47,279 INFO L231 Difference]: Finished difference. Result has 319 places, 382 transitions, 5281 flow [2023-08-30 00:48:47,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5281, PETRI_PLACES=319, PETRI_TRANSITIONS=382} [2023-08-30 00:48:47,280 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2023-08-30 00:48:47,280 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 382 transitions, 5281 flow [2023-08-30 00:48:47,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.76) internal successors, (1794), 25 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:47,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:47,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:47,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:47,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 00:48:47,482 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:47,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash 691220539, now seen corresponding path program 22 times [2023-08-30 00:48:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664672938] [2023-08-30 00:48:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:47,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:47,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664672938] [2023-08-30 00:48:47,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664672938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:47,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394190700] [2023-08-30 00:48:47,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:48:47,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:47,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:47,681 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:47,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 00:48:47,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:48:47,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:48:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:47,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:48,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394190700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:48,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:48,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 00:48:48,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418238543] [2023-08-30 00:48:48,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:48,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:48:48,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:48,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:48:48,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:48:48,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:48,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 382 transitions, 5281 flow. Second operand has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:48,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:48,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:48,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:49,116 INFO L130 PetriNetUnfolder]: 1045/2190 cut-off events. [2023-08-30 00:48:49,116 INFO L131 PetriNetUnfolder]: For 71528/71528 co-relation queries the response was YES. [2023-08-30 00:48:49,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17833 conditions, 2190 events. 1045/2190 cut-off events. For 71528/71528 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15067 event pairs, 82 based on Foata normal form. 4/2192 useless extension candidates. Maximal degree in co-relation 17740. Up to 1554 conditions per place. [2023-08-30 00:48:49,132 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 284 selfloop transitions, 163 changer transitions 22/469 dead transitions. [2023-08-30 00:48:49,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 469 transitions, 7368 flow [2023-08-30 00:48:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:48:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:48:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1803 transitions. [2023-08-30 00:48:49,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220505617977528 [2023-08-30 00:48:49,134 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1803 transitions. [2023-08-30 00:48:49,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1803 transitions. [2023-08-30 00:48:49,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:49,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1803 transitions. [2023-08-30 00:48:49,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 75.125) internal successors, (1803), 24 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:49,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 178.0) internal successors, (4450), 25 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:49,140 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 178.0) internal successors, (4450), 25 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:49,140 INFO L175 Difference]: Start difference. First operand has 319 places, 382 transitions, 5281 flow. Second operand 24 states and 1803 transitions. [2023-08-30 00:48:49,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 469 transitions, 7368 flow [2023-08-30 00:48:49,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 469 transitions, 7071 flow, removed 60 selfloop flow, removed 20 redundant places. [2023-08-30 00:48:49,406 INFO L231 Difference]: Finished difference. Result has 311 places, 394 transitions, 5707 flow [2023-08-30 00:48:49,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=5023, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5707, PETRI_PLACES=311, PETRI_TRANSITIONS=394} [2023-08-30 00:48:49,407 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2023-08-30 00:48:49,407 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 394 transitions, 5707 flow [2023-08-30 00:48:49,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:49,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:49,408 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:49,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-30 00:48:49,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:49,612 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:49,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash -216780269, now seen corresponding path program 23 times [2023-08-30 00:48:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913457491] [2023-08-30 00:48:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913457491] [2023-08-30 00:48:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913457491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039911593] [2023-08-30 00:48:49,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:48:49,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:49,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:49,818 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:49,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 00:48:49,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:48:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:49,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 00:48:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:50,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:50,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039911593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:50,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:50,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 00:48:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392423445] [2023-08-30 00:48:50,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:50,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:48:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:50,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:48:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:48:50,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:50,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 394 transitions, 5707 flow. Second operand has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:50,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:50,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:50,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:52,101 INFO L130 PetriNetUnfolder]: 1286/2715 cut-off events. [2023-08-30 00:48:52,102 INFO L131 PetriNetUnfolder]: For 101691/101691 co-relation queries the response was YES. [2023-08-30 00:48:52,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22904 conditions, 2715 events. 1286/2715 cut-off events. For 101691/101691 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19793 event pairs, 64 based on Foata normal form. 15/2728 useless extension candidates. Maximal degree in co-relation 22808. Up to 930 conditions per place. [2023-08-30 00:48:52,122 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 316 selfloop transitions, 256 changer transitions 33/605 dead transitions. [2023-08-30 00:48:52,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 605 transitions, 10170 flow [2023-08-30 00:48:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 00:48:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 00:48:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3208 transitions. [2023-08-30 00:48:52,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41912725372354326 [2023-08-30 00:48:52,127 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3208 transitions. [2023-08-30 00:48:52,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3208 transitions. [2023-08-30 00:48:52,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:52,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3208 transitions. [2023-08-30 00:48:52,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 74.6046511627907) internal successors, (3208), 43 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:52,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 178.0) internal successors, (7832), 44 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:52,136 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 178.0) internal successors, (7832), 44 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:52,136 INFO L175 Difference]: Start difference. First operand has 311 places, 394 transitions, 5707 flow. Second operand 43 states and 3208 transitions. [2023-08-30 00:48:52,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 605 transitions, 10170 flow [2023-08-30 00:48:52,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 605 transitions, 9357 flow, removed 262 selfloop flow, removed 22 redundant places. [2023-08-30 00:48:52,443 INFO L231 Difference]: Finished difference. Result has 340 places, 444 transitions, 6992 flow [2023-08-30 00:48:52,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=6992, PETRI_PLACES=340, PETRI_TRANSITIONS=444} [2023-08-30 00:48:52,444 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 311 predicate places. [2023-08-30 00:48:52,444 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 444 transitions, 6992 flow [2023-08-30 00:48:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:52,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:52,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:52,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:52,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:52,645 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:52,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash -773123167, now seen corresponding path program 24 times [2023-08-30 00:48:52,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:52,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887820121] [2023-08-30 00:48:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:52,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:52,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887820121] [2023-08-30 00:48:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887820121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107359177] [2023-08-30 00:48:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:48:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:52,837 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:52,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 00:48:52,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:48:52,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 00:48:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:53,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:53,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107359177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:53,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:53,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 00:48:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550576606] [2023-08-30 00:48:53,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:53,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:48:53,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:53,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:48:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:48:53,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:53,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 444 transitions, 6992 flow. Second operand has 28 states, 28 states have (on average 71.67857142857143) internal successors, (2007), 28 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:53,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:53,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:53,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:55,842 INFO L130 PetriNetUnfolder]: 1392/2944 cut-off events. [2023-08-30 00:48:55,842 INFO L131 PetriNetUnfolder]: For 112394/112394 co-relation queries the response was YES. [2023-08-30 00:48:55,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 2944 events. 1392/2944 cut-off events. For 112394/112394 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21784 event pairs, 24 based on Foata normal form. 12/2954 useless extension candidates. Maximal degree in co-relation 25358. Up to 1350 conditions per place. [2023-08-30 00:48:55,865 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 389 selfloop transitions, 159 changer transitions 26/574 dead transitions. [2023-08-30 00:48:55,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 574 transitions, 9847 flow [2023-08-30 00:48:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 00:48:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 00:48:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2609 transitions. [2023-08-30 00:48:55,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187800963081862 [2023-08-30 00:48:55,868 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2609 transitions. [2023-08-30 00:48:55,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2609 transitions. [2023-08-30 00:48:55,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:55,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2609 transitions. [2023-08-30 00:48:55,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.54285714285714) internal successors, (2609), 35 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:55,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:55,875 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:55,875 INFO L175 Difference]: Start difference. First operand has 340 places, 444 transitions, 6992 flow. Second operand 35 states and 2609 transitions. [2023-08-30 00:48:55,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 574 transitions, 9847 flow [2023-08-30 00:48:56,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 574 transitions, 9149 flow, removed 265 selfloop flow, removed 30 redundant places. [2023-08-30 00:48:56,257 INFO L231 Difference]: Finished difference. Result has 347 places, 466 transitions, 7402 flow [2023-08-30 00:48:56,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7402, PETRI_PLACES=347, PETRI_TRANSITIONS=466} [2023-08-30 00:48:56,257 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 318 predicate places. [2023-08-30 00:48:56,258 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 466 transitions, 7402 flow [2023-08-30 00:48:56,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.67857142857143) internal successors, (2007), 28 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:56,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:56,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:56,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:56,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 00:48:56,461 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:56,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -559238599, now seen corresponding path program 25 times [2023-08-30 00:48:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170945870] [2023-08-30 00:48:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:56,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170945870] [2023-08-30 00:48:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170945870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:56,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123753002] [2023-08-30 00:48:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:48:56,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:56,673 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:56,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 00:48:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 00:48:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:56,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123753002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:57,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:57,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-30 00:48:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219293683] [2023-08-30 00:48:57,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:48:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:48:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:48:57,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:48:57,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 466 transitions, 7402 flow. Second operand has 24 states, 24 states have (on average 71.66666666666667) internal successors, (1720), 24 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:48:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:58,534 INFO L130 PetriNetUnfolder]: 1409/3003 cut-off events. [2023-08-30 00:48:58,534 INFO L131 PetriNetUnfolder]: For 112303/112303 co-relation queries the response was YES. [2023-08-30 00:48:58,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25689 conditions, 3003 events. 1409/3003 cut-off events. For 112303/112303 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22441 event pairs, 94 based on Foata normal form. 14/3015 useless extension candidates. Maximal degree in co-relation 25582. Up to 2121 conditions per place. [2023-08-30 00:48:58,559 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 417 selfloop transitions, 111 changer transitions 31/559 dead transitions. [2023-08-30 00:48:58,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 559 transitions, 9894 flow [2023-08-30 00:48:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:48:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:48:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1501 transitions. [2023-08-30 00:48:58,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216292134831461 [2023-08-30 00:48:58,561 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1501 transitions. [2023-08-30 00:48:58,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1501 transitions. [2023-08-30 00:48:58,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:58,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1501 transitions. [2023-08-30 00:48:58,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.05) internal successors, (1501), 20 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 178.0) internal successors, (3738), 21 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,564 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 178.0) internal successors, (3738), 21 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,564 INFO L175 Difference]: Start difference. First operand has 347 places, 466 transitions, 7402 flow. Second operand 20 states and 1501 transitions. [2023-08-30 00:48:58,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 559 transitions, 9894 flow [2023-08-30 00:48:58,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 559 transitions, 9670 flow, removed 73 selfloop flow, removed 20 redundant places. [2023-08-30 00:48:58,940 INFO L231 Difference]: Finished difference. Result has 346 places, 486 transitions, 7967 flow [2023-08-30 00:48:58,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7200, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7967, PETRI_PLACES=346, PETRI_TRANSITIONS=486} [2023-08-30 00:48:58,941 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 317 predicate places. [2023-08-30 00:48:58,941 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 486 transitions, 7967 flow [2023-08-30 00:48:58,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 71.66666666666667) internal successors, (1720), 24 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:58,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:58,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 00:48:59,147 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:59,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1276204399, now seen corresponding path program 26 times [2023-08-30 00:48:59,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:59,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307185462] [2023-08-30 00:48:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:59,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:48:59,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:59,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307185462] [2023-08-30 00:48:59,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307185462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:59,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761291848] [2023-08-30 00:48:59,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:48:59,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:59,321 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:59,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 00:48:59,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:59,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 00:48:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:59,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761291848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:59,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:59,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-30 00:48:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143610524] [2023-08-30 00:48:59,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 00:48:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 00:48:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-08-30 00:49:00,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:00,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 486 transitions, 7967 flow. Second operand has 27 states, 27 states have (on average 71.81481481481481) internal successors, (1939), 27 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:00,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:00,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:01,900 INFO L130 PetriNetUnfolder]: 1449/3039 cut-off events. [2023-08-30 00:49:01,900 INFO L131 PetriNetUnfolder]: For 120174/120174 co-relation queries the response was YES. [2023-08-30 00:49:01,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27017 conditions, 3039 events. 1449/3039 cut-off events. For 120174/120174 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22383 event pairs, 30 based on Foata normal form. 7/3046 useless extension candidates. Maximal degree in co-relation 26907. Up to 1504 conditions per place. [2023-08-30 00:49:01,926 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 397 selfloop transitions, 152 changer transitions 23/572 dead transitions. [2023-08-30 00:49:01,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 572 transitions, 10119 flow [2023-08-30 00:49:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 00:49:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 00:49:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2234 transitions. [2023-08-30 00:49:01,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183520599250936 [2023-08-30 00:49:01,929 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2234 transitions. [2023-08-30 00:49:01,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2234 transitions. [2023-08-30 00:49:01,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:01,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2234 transitions. [2023-08-30 00:49:01,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.46666666666667) internal successors, (2234), 30 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 178.0) internal successors, (5518), 31 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,933 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 178.0) internal successors, (5518), 31 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,933 INFO L175 Difference]: Start difference. First operand has 346 places, 486 transitions, 7967 flow. Second operand 30 states and 2234 transitions. [2023-08-30 00:49:01,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 572 transitions, 10119 flow [2023-08-30 00:49:02,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 572 transitions, 9580 flow, removed 166 selfloop flow, removed 17 redundant places. [2023-08-30 00:49:02,477 INFO L231 Difference]: Finished difference. Result has 358 places, 493 transitions, 8072 flow [2023-08-30 00:49:02,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7520, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8072, PETRI_PLACES=358, PETRI_TRANSITIONS=493} [2023-08-30 00:49:02,478 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 329 predicate places. [2023-08-30 00:49:02,478 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 493 transitions, 8072 flow [2023-08-30 00:49:02,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 71.81481481481481) internal successors, (1939), 27 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:02,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:02,479 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:02,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:02,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:02,685 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:02,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1841273228, now seen corresponding path program 27 times [2023-08-30 00:49:02,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:02,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163443943] [2023-08-30 00:49:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:02,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163443943] [2023-08-30 00:49:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163443943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317596775] [2023-08-30 00:49:02,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:49:02,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:02,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:02,965 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 00:49:03,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:49:03,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:49:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:03,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317596775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:03,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 00:49:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914782942] [2023-08-30 00:49:03,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:49:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:49:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:49:03,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:03,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 493 transitions, 8072 flow. Second operand has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:03,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:03,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:03,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:06,043 INFO L130 PetriNetUnfolder]: 2022/4294 cut-off events. [2023-08-30 00:49:06,043 INFO L131 PetriNetUnfolder]: For 176507/176507 co-relation queries the response was YES. [2023-08-30 00:49:06,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39224 conditions, 4294 events. 2022/4294 cut-off events. For 176507/176507 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34344 event pairs, 96 based on Foata normal form. 25/4319 useless extension candidates. Maximal degree in co-relation 39114. Up to 1357 conditions per place. [2023-08-30 00:49:06,090 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 370 selfloop transitions, 414 changer transitions 54/838 dead transitions. [2023-08-30 00:49:06,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 838 transitions, 15302 flow [2023-08-30 00:49:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 00:49:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 00:49:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3451 transitions. [2023-08-30 00:49:06,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214704445530044 [2023-08-30 00:49:06,096 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3451 transitions. [2023-08-30 00:49:06,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3451 transitions. [2023-08-30 00:49:06,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:06,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3451 transitions. [2023-08-30 00:49:06,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 75.02173913043478) internal successors, (3451), 46 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 178.0) internal successors, (8366), 47 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,107 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 178.0) internal successors, (8366), 47 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,107 INFO L175 Difference]: Start difference. First operand has 358 places, 493 transitions, 8072 flow. Second operand 46 states and 3451 transitions. [2023-08-30 00:49:06,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 838 transitions, 15302 flow [2023-08-30 00:49:06,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 838 transitions, 15002 flow, removed 91 selfloop flow, removed 18 redundant places. [2023-08-30 00:49:06,822 INFO L231 Difference]: Finished difference. Result has 393 places, 650 transitions, 12108 flow [2023-08-30 00:49:06,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7826, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12108, PETRI_PLACES=393, PETRI_TRANSITIONS=650} [2023-08-30 00:49:06,824 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 364 predicate places. [2023-08-30 00:49:06,824 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 650 transitions, 12108 flow [2023-08-30 00:49:06,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:06,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:06,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:07,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:07,031 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:07,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:07,032 INFO L85 PathProgramCache]: Analyzing trace with hash -595608552, now seen corresponding path program 28 times [2023-08-30 00:49:07,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:07,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844780565] [2023-08-30 00:49:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:07,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:07,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844780565] [2023-08-30 00:49:07,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844780565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:07,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614775023] [2023-08-30 00:49:07,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:49:07,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:07,254 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:07,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 00:49:07,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:49:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 00:49:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:07,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614775023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:07,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:07,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-30 00:49:07,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166206370] [2023-08-30 00:49:07,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:07,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 00:49:07,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:07,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 00:49:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2023-08-30 00:49:08,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:08,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 650 transitions, 12108 flow. Second operand has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:08,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:08,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:08,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:12,266 INFO L130 PetriNetUnfolder]: 3255/7030 cut-off events. [2023-08-30 00:49:12,266 INFO L131 PetriNetUnfolder]: For 369005/369005 co-relation queries the response was YES. [2023-08-30 00:49:12,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72880 conditions, 7030 events. 3255/7030 cut-off events. For 369005/369005 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 62051 event pairs, 215 based on Foata normal form. 24/7054 useless extension candidates. Maximal degree in co-relation 72756. Up to 2509 conditions per place. [2023-08-30 00:49:12,332 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 596 selfloop transitions, 584 changer transitions 30/1210 dead transitions. [2023-08-30 00:49:12,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1210 transitions, 26081 flow [2023-08-30 00:49:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-30 00:49:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-30 00:49:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4288 transitions. [2023-08-30 00:49:12,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226296077271831 [2023-08-30 00:49:12,336 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4288 transitions. [2023-08-30 00:49:12,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4288 transitions. [2023-08-30 00:49:12,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:12,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4288 transitions. [2023-08-30 00:49:12,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 75.2280701754386) internal successors, (4288), 57 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:12,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 178.0) internal successors, (10324), 58 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:12,347 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 178.0) internal successors, (10324), 58 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:12,347 INFO L175 Difference]: Start difference. First operand has 393 places, 650 transitions, 12108 flow. Second operand 57 states and 4288 transitions. [2023-08-30 00:49:12,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1210 transitions, 26081 flow [2023-08-30 00:49:14,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1210 transitions, 24099 flow, removed 892 selfloop flow, removed 26 redundant places. [2023-08-30 00:49:14,074 INFO L231 Difference]: Finished difference. Result has 436 places, 937 transitions, 19699 flow [2023-08-30 00:49:14,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=11223, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=19699, PETRI_PLACES=436, PETRI_TRANSITIONS=937} [2023-08-30 00:49:14,075 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 407 predicate places. [2023-08-30 00:49:14,075 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 937 transitions, 19699 flow [2023-08-30 00:49:14,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:14,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:14,075 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:14,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:14,276 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:14,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1123329800, now seen corresponding path program 29 times [2023-08-30 00:49:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954577843] [2023-08-30 00:49:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:14,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:14,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954577843] [2023-08-30 00:49:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954577843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:14,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757701641] [2023-08-30 00:49:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:49:14,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:14,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:14,473 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:14,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 00:49:14,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 00:49:14,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:49:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:14,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757701641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:14,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:14,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-30 00:49:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411097748] [2023-08-30 00:49:14,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:49:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:49:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:49:15,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:15,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 937 transitions, 19699 flow. Second operand has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:15,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:15,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:15,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:19,032 INFO L130 PetriNetUnfolder]: 3580/7585 cut-off events. [2023-08-30 00:49:19,032 INFO L131 PetriNetUnfolder]: For 521249/521249 co-relation queries the response was YES. [2023-08-30 00:49:19,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84819 conditions, 7585 events. 3580/7585 cut-off events. For 521249/521249 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 66654 event pairs, 231 based on Foata normal form. 72/7657 useless extension candidates. Maximal degree in co-relation 84680. Up to 2511 conditions per place. [2023-08-30 00:49:19,108 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 512 selfloop transitions, 495 changer transitions 291/1298 dead transitions. [2023-08-30 00:49:19,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1298 transitions, 30086 flow [2023-08-30 00:49:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 00:49:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 00:49:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3743 transitions. [2023-08-30 00:49:19,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420561797752809 [2023-08-30 00:49:19,112 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3743 transitions. [2023-08-30 00:49:19,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3743 transitions. [2023-08-30 00:49:19,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:19,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3743 transitions. [2023-08-30 00:49:19,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 74.86) internal successors, (3743), 50 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:19,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:19,122 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:19,123 INFO L175 Difference]: Start difference. First operand has 436 places, 937 transitions, 19699 flow. Second operand 50 states and 3743 transitions. [2023-08-30 00:49:19,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1298 transitions, 30086 flow [2023-08-30 00:49:21,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1298 transitions, 27964 flow, removed 878 selfloop flow, removed 28 redundant places. [2023-08-30 00:49:21,843 INFO L231 Difference]: Finished difference. Result has 472 places, 845 transitions, 19049 flow [2023-08-30 00:49:21,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=17874, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=937, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=19049, PETRI_PLACES=472, PETRI_TRANSITIONS=845} [2023-08-30 00:49:21,844 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 443 predicate places. [2023-08-30 00:49:21,844 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 845 transitions, 19049 flow [2023-08-30 00:49:21,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:21,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:21,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:21,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 00:49:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 00:49:22,045 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:22,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash 198716070, now seen corresponding path program 30 times [2023-08-30 00:49:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:22,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006403406] [2023-08-30 00:49:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:22,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:22,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006403406] [2023-08-30 00:49:22,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006403406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:22,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305270896] [2023-08-30 00:49:22,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:49:22,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:22,255 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:22,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 00:49:22,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 00:49:22,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:49:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:22,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305270896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:22,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:22,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 00:49:22,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249050304] [2023-08-30 00:49:22,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:22,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:49:22,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:22,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:49:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:49:22,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:22,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 845 transitions, 19049 flow. Second operand has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:22,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:22,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:22,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:26,571 INFO L130 PetriNetUnfolder]: 3222/6960 cut-off events. [2023-08-30 00:49:26,571 INFO L131 PetriNetUnfolder]: For 605325/605325 co-relation queries the response was YES. [2023-08-30 00:49:26,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81609 conditions, 6960 events. 3222/6960 cut-off events. For 605325/605325 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 61211 event pairs, 158 based on Foata normal form. 41/7001 useless extension candidates. Maximal degree in co-relation 81458. Up to 1790 conditions per place. [2023-08-30 00:49:26,646 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 417 selfloop transitions, 581 changer transitions 30/1028 dead transitions. [2023-08-30 00:49:26,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1028 transitions, 24834 flow [2023-08-30 00:49:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 00:49:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 00:49:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2612 transitions. [2023-08-30 00:49:26,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192616372391653 [2023-08-30 00:49:26,649 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2612 transitions. [2023-08-30 00:49:26,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2612 transitions. [2023-08-30 00:49:26,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:26,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2612 transitions. [2023-08-30 00:49:26,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.62857142857143) internal successors, (2612), 35 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:26,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:26,655 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 178.0) internal successors, (6408), 36 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:26,655 INFO L175 Difference]: Start difference. First operand has 472 places, 845 transitions, 19049 flow. Second operand 35 states and 2612 transitions. [2023-08-30 00:49:26,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1028 transitions, 24834 flow [2023-08-30 00:49:29,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1028 transitions, 22490 flow, removed 990 selfloop flow, removed 41 redundant places. [2023-08-30 00:49:29,902 INFO L231 Difference]: Finished difference. Result has 436 places, 904 transitions, 20487 flow [2023-08-30 00:49:29,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=17051, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20487, PETRI_PLACES=436, PETRI_TRANSITIONS=904} [2023-08-30 00:49:29,903 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 407 predicate places. [2023-08-30 00:49:29,903 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 904 transitions, 20487 flow [2023-08-30 00:49:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.57142857142857) internal successors, (2004), 28 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:29,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:29,904 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:29,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:30,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 00:49:30,105 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:30,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 116348760, now seen corresponding path program 31 times [2023-08-30 00:49:30,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:30,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656480888] [2023-08-30 00:49:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:30,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:30,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656480888] [2023-08-30 00:49:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656480888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140680173] [2023-08-30 00:49:30,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:49:30,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:30,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:30,287 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:30,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 00:49:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:49:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:30,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140680173] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:30,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:30,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-30 00:49:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748223840] [2023-08-30 00:49:30,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:30,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:49:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:49:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:49:31,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:31,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 904 transitions, 20487 flow. Second operand has 28 states, 28 states have (on average 71.64285714285714) internal successors, (2006), 28 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:31,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:31,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:31,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:34,597 INFO L130 PetriNetUnfolder]: 3179/6630 cut-off events. [2023-08-30 00:49:34,597 INFO L131 PetriNetUnfolder]: For 551939/551939 co-relation queries the response was YES. [2023-08-30 00:49:34,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76853 conditions, 6630 events. 3179/6630 cut-off events. For 551939/551939 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 56019 event pairs, 160 based on Foata normal form. 70/6700 useless extension candidates. Maximal degree in co-relation 76709. Up to 2518 conditions per place. [2023-08-30 00:49:34,667 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 482 selfloop transitions, 488 changer transitions 46/1016 dead transitions. [2023-08-30 00:49:34,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1016 transitions, 24387 flow [2023-08-30 00:49:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 00:49:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 00:49:34,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2972 transitions. [2023-08-30 00:49:34,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174157303370786 [2023-08-30 00:49:34,669 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2972 transitions. [2023-08-30 00:49:34,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2972 transitions. [2023-08-30 00:49:34,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:34,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2972 transitions. [2023-08-30 00:49:34,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 74.3) internal successors, (2972), 40 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:34,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 178.0) internal successors, (7298), 41 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:34,674 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 178.0) internal successors, (7298), 41 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:34,674 INFO L175 Difference]: Start difference. First operand has 436 places, 904 transitions, 20487 flow. Second operand 40 states and 2972 transitions. [2023-08-30 00:49:34,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1016 transitions, 24387 flow [2023-08-30 00:49:37,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1016 transitions, 23396 flow, removed 364 selfloop flow, removed 23 redundant places. [2023-08-30 00:49:37,369 INFO L231 Difference]: Finished difference. Result has 454 places, 880 transitions, 20096 flow [2023-08-30 00:49:37,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=19608, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20096, PETRI_PLACES=454, PETRI_TRANSITIONS=880} [2023-08-30 00:49:37,370 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 425 predicate places. [2023-08-30 00:49:37,370 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 880 transitions, 20096 flow [2023-08-30 00:49:37,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.64285714285714) internal successors, (2006), 28 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:37,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:37,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:37,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-30 00:49:37,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 00:49:37,571 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:37,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1917654422, now seen corresponding path program 32 times [2023-08-30 00:49:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497302330] [2023-08-30 00:49:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:37,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497302330] [2023-08-30 00:49:37,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497302330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604644973] [2023-08-30 00:49:37,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:49:37,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:37,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:37,793 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:37,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 00:49:37,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:49:37,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:49:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:38,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604644973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:38,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:38,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 00:49:38,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656494334] [2023-08-30 00:49:38,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:38,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 00:49:38,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 00:49:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-08-30 00:49:38,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:38,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 880 transitions, 20096 flow. Second operand has 27 states, 27 states have (on average 71.62962962962963) internal successors, (1934), 27 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:38,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:38,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:38,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:42,416 INFO L130 PetriNetUnfolder]: 3767/7754 cut-off events. [2023-08-30 00:49:42,416 INFO L131 PetriNetUnfolder]: For 628105/628105 co-relation queries the response was YES. [2023-08-30 00:49:42,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92341 conditions, 7754 events. 3767/7754 cut-off events. For 628105/628105 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 66791 event pairs, 322 based on Foata normal form. 44/7798 useless extension candidates. Maximal degree in co-relation 92202. Up to 3059 conditions per place. [2023-08-30 00:49:42,513 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 558 selfloop transitions, 480 changer transitions 267/1305 dead transitions. [2023-08-30 00:49:42,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1305 transitions, 32226 flow [2023-08-30 00:49:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 00:49:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 00:49:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3572 transitions. [2023-08-30 00:49:42,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41807116104868913 [2023-08-30 00:49:42,517 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3572 transitions. [2023-08-30 00:49:42,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3572 transitions. [2023-08-30 00:49:42,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:42,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3572 transitions. [2023-08-30 00:49:42,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 74.41666666666667) internal successors, (3572), 48 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:42,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 178.0) internal successors, (8722), 49 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:42,523 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 178.0) internal successors, (8722), 49 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:42,524 INFO L175 Difference]: Start difference. First operand has 454 places, 880 transitions, 20096 flow. Second operand 48 states and 3572 transitions. [2023-08-30 00:49:42,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1305 transitions, 32226 flow [2023-08-30 00:49:45,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1305 transitions, 30206 flow, removed 611 selfloop flow, removed 38 redundant places. [2023-08-30 00:49:45,702 INFO L231 Difference]: Finished difference. Result has 481 places, 915 transitions, 22530 flow [2023-08-30 00:49:45,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=18876, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=22530, PETRI_PLACES=481, PETRI_TRANSITIONS=915} [2023-08-30 00:49:45,703 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 452 predicate places. [2023-08-30 00:49:45,704 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 915 transitions, 22530 flow [2023-08-30 00:49:45,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 71.62962962962963) internal successors, (1934), 27 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:45,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:45,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:45,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:45,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 00:49:45,905 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:45,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:45,905 INFO L85 PathProgramCache]: Analyzing trace with hash 236954636, now seen corresponding path program 33 times [2023-08-30 00:49:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994444855] [2023-08-30 00:49:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:45,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:46,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:46,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994444855] [2023-08-30 00:49:46,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994444855] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:46,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651631922] [2023-08-30 00:49:46,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:49:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:46,120 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:46,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 00:49:46,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 00:49:46,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:49:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:46,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:46,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651631922] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:46,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:46,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-08-30 00:49:46,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156845127] [2023-08-30 00:49:46,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:46,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:49:46,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:46,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:49:46,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:49:46,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:46,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 915 transitions, 22530 flow. Second operand has 26 states, 26 states have (on average 71.65384615384616) internal successors, (1863), 26 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:46,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:46,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:46,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:51,056 INFO L130 PetriNetUnfolder]: 3907/8004 cut-off events. [2023-08-30 00:49:51,057 INFO L131 PetriNetUnfolder]: For 631234/631234 co-relation queries the response was YES. [2023-08-30 00:49:51,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95174 conditions, 8004 events. 3907/8004 cut-off events. For 631234/631234 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 68887 event pairs, 510 based on Foata normal form. 18/8022 useless extension candidates. Maximal degree in co-relation 95024. Up to 5426 conditions per place. [2023-08-30 00:49:51,167 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 871 selfloop transitions, 286 changer transitions 121/1278 dead transitions. [2023-08-30 00:49:51,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1278 transitions, 31311 flow [2023-08-30 00:49:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 00:49:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 00:49:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3671 transitions. [2023-08-30 00:49:51,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42088970419628524 [2023-08-30 00:49:51,170 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3671 transitions. [2023-08-30 00:49:51,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3671 transitions. [2023-08-30 00:49:51,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:51,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3671 transitions. [2023-08-30 00:49:51,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 74.91836734693878) internal successors, (3671), 49 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:51,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:51,177 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:51,177 INFO L175 Difference]: Start difference. First operand has 481 places, 915 transitions, 22530 flow. Second operand 49 states and 3671 transitions. [2023-08-30 00:49:51,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1278 transitions, 31311 flow [2023-08-30 00:49:54,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1278 transitions, 29559 flow, removed 508 selfloop flow, removed 44 redundant places. [2023-08-30 00:49:54,295 INFO L231 Difference]: Finished difference. Result has 483 places, 1016 transitions, 24547 flow [2023-08-30 00:49:54,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=21023, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=24547, PETRI_PLACES=483, PETRI_TRANSITIONS=1016} [2023-08-30 00:49:54,296 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 454 predicate places. [2023-08-30 00:49:54,296 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 1016 transitions, 24547 flow [2023-08-30 00:49:54,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.65384615384616) internal successors, (1863), 26 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:54,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:54,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:54,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:54,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 00:49:54,501 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:54,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:54,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1646378006, now seen corresponding path program 34 times [2023-08-30 00:49:54,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:54,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605642352] [2023-08-30 00:49:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:54,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:54,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:54,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605642352] [2023-08-30 00:49:54,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605642352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:54,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430471830] [2023-08-30 00:49:54,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:49:54,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:54,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:54,675 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:54,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 00:49:54,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:49:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 00:49:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:54,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430471830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:55,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:55,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-30 00:49:55,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137075261] [2023-08-30 00:49:55,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:55,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 00:49:55,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:55,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 00:49:55,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-08-30 00:49:55,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:49:55,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1016 transitions, 24547 flow. Second operand has 27 states, 27 states have (on average 71.66666666666667) internal successors, (1935), 27 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:55,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:55,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:49:55,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:59,405 INFO L130 PetriNetUnfolder]: 3804/7699 cut-off events. [2023-08-30 00:49:59,406 INFO L131 PetriNetUnfolder]: For 654166/654166 co-relation queries the response was YES. [2023-08-30 00:49:59,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93457 conditions, 7699 events. 3804/7699 cut-off events. For 654166/654166 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 64918 event pairs, 494 based on Foata normal form. 32/7731 useless extension candidates. Maximal degree in co-relation 93298. Up to 5630 conditions per place. [2023-08-30 00:49:59,498 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 874 selfloop transitions, 202 changer transitions 43/1119 dead transitions. [2023-08-30 00:49:59,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1119 transitions, 28599 flow [2023-08-30 00:49:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 00:49:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 00:49:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2665 transitions. [2023-08-30 00:49:59,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158863920099875 [2023-08-30 00:49:59,500 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2665 transitions. [2023-08-30 00:49:59,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2665 transitions. [2023-08-30 00:49:59,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:59,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2665 transitions. [2023-08-30 00:49:59,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 74.02777777777777) internal successors, (2665), 36 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:59,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:59,505 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 178.0) internal successors, (6586), 37 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:59,505 INFO L175 Difference]: Start difference. First operand has 483 places, 1016 transitions, 24547 flow. Second operand 36 states and 2665 transitions. [2023-08-30 00:49:59,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1119 transitions, 28599 flow [2023-08-30 00:50:02,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1119 transitions, 27832 flow, removed 332 selfloop flow, removed 34 redundant places. [2023-08-30 00:50:02,790 INFO L231 Difference]: Finished difference. Result has 469 places, 1011 transitions, 24185 flow [2023-08-30 00:50:02,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=23879, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24185, PETRI_PLACES=469, PETRI_TRANSITIONS=1011} [2023-08-30 00:50:02,791 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 440 predicate places. [2023-08-30 00:50:02,791 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1011 transitions, 24185 flow [2023-08-30 00:50:02,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 71.66666666666667) internal successors, (1935), 27 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:02,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:02,791 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:02,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:02,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:02,992 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:02,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1609219385, now seen corresponding path program 35 times [2023-08-30 00:50:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:02,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145064672] [2023-08-30 00:50:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145064672] [2023-08-30 00:50:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145064672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223945424] [2023-08-30 00:50:03,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:50:03,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:03,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:03,232 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 00:50:03,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:50:03,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 00:50:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:03,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:03,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223945424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:03,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:03,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-30 00:50:03,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517376153] [2023-08-30 00:50:03,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:03,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 00:50:03,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 00:50:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-08-30 00:50:03,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:50:03,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1011 transitions, 24185 flow. Second operand has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:03,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:03,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:50:03,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:08,583 INFO L130 PetriNetUnfolder]: 3933/7789 cut-off events. [2023-08-30 00:50:08,583 INFO L131 PetriNetUnfolder]: For 667851/667851 co-relation queries the response was YES. [2023-08-30 00:50:08,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94808 conditions, 7789 events. 3933/7789 cut-off events. For 667851/667851 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 64775 event pairs, 219 based on Foata normal form. 115/7904 useless extension candidates. Maximal degree in co-relation 94665. Up to 2878 conditions per place. [2023-08-30 00:50:08,660 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 582 selfloop transitions, 394 changer transitions 291/1267 dead transitions. [2023-08-30 00:50:08,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1267 transitions, 32295 flow [2023-08-30 00:50:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 00:50:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 00:50:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3707 transitions. [2023-08-30 00:50:08,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41651685393258425 [2023-08-30 00:50:08,663 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3707 transitions. [2023-08-30 00:50:08,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3707 transitions. [2023-08-30 00:50:08,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:08,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3707 transitions. [2023-08-30 00:50:08,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 74.14) internal successors, (3707), 50 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:08,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:08,671 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:08,671 INFO L175 Difference]: Start difference. First operand has 469 places, 1011 transitions, 24185 flow. Second operand 50 states and 3707 transitions. [2023-08-30 00:50:08,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1267 transitions, 32295 flow [2023-08-30 00:50:11,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1267 transitions, 31757 flow, removed 168 selfloop flow, removed 29 redundant places. [2023-08-30 00:50:11,525 INFO L231 Difference]: Finished difference. Result has 493 places, 897 transitions, 21406 flow [2023-08-30 00:50:11,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=23739, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=21406, PETRI_PLACES=493, PETRI_TRANSITIONS=897} [2023-08-30 00:50:11,526 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 464 predicate places. [2023-08-30 00:50:11,526 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 897 transitions, 21406 flow [2023-08-30 00:50:11,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:11,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:11,527 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:11,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:11,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:11,733 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:11,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -377304455, now seen corresponding path program 36 times [2023-08-30 00:50:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646013786] [2023-08-30 00:50:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:11,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:11,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646013786] [2023-08-30 00:50:11,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646013786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:11,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66742940] [2023-08-30 00:50:11,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:50:11,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:11,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:11,943 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:11,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 00:50:12,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:50:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 00:50:12,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:12,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66742940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:12,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-30 00:50:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712991444] [2023-08-30 00:50:12,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 00:50:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 00:50:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2023-08-30 00:50:12,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:50:12,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 897 transitions, 21406 flow. Second operand has 30 states, 30 states have (on average 71.56666666666666) internal successors, (2147), 30 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:12,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:12,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:50:12,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:16,556 INFO L130 PetriNetUnfolder]: 3560/6952 cut-off events. [2023-08-30 00:50:16,557 INFO L131 PetriNetUnfolder]: For 514176/514176 co-relation queries the response was YES. [2023-08-30 00:50:16,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83290 conditions, 6952 events. 3560/6952 cut-off events. For 514176/514176 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 53945 event pairs, 110 based on Foata normal form. 81/7033 useless extension candidates. Maximal degree in co-relation 83140. Up to 3350 conditions per place. [2023-08-30 00:50:16,817 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 833 selfloop transitions, 259 changer transitions 282/1374 dead transitions. [2023-08-30 00:50:16,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1374 transitions, 33409 flow [2023-08-30 00:50:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 00:50:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 00:50:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4176 transitions. [2023-08-30 00:50:16,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189406099518459 [2023-08-30 00:50:16,820 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4176 transitions. [2023-08-30 00:50:16,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4176 transitions. [2023-08-30 00:50:16,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:16,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4176 transitions. [2023-08-30 00:50:16,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 74.57142857142857) internal successors, (4176), 56 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:16,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 178.0) internal successors, (10146), 57 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:16,828 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 178.0) internal successors, (10146), 57 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:16,828 INFO L175 Difference]: Start difference. First operand has 493 places, 897 transitions, 21406 flow. Second operand 56 states and 4176 transitions. [2023-08-30 00:50:16,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1374 transitions, 33409 flow [2023-08-30 00:50:18,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1374 transitions, 31634 flow, removed 613 selfloop flow, removed 43 redundant places. [2023-08-30 00:50:18,763 INFO L231 Difference]: Finished difference. Result has 519 places, 977 transitions, 22354 flow [2023-08-30 00:50:18,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=19826, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=22354, PETRI_PLACES=519, PETRI_TRANSITIONS=977} [2023-08-30 00:50:18,764 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 490 predicate places. [2023-08-30 00:50:18,764 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 977 transitions, 22354 flow [2023-08-30 00:50:18,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 71.56666666666666) internal successors, (2147), 30 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:18,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:18,764 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:18,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:18,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:18,969 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:18,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash 760726210, now seen corresponding path program 37 times [2023-08-30 00:50:18,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:18,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753402010] [2023-08-30 00:50:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:19,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:19,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753402010] [2023-08-30 00:50:19,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753402010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:19,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360643424] [2023-08-30 00:50:19,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:50:19,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:19,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:19,282 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:19,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 00:50:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:19,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 00:50:19,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:19,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:19,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360643424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:19,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:19,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-30 00:50:19,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317941433] [2023-08-30 00:50:19,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:19,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 00:50:19,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 00:50:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 00:50:20,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:50:20,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 977 transitions, 22354 flow. Second operand has 34 states, 34 states have (on average 71.5) internal successors, (2431), 34 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:20,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:20,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:50:20,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:24,710 INFO L130 PetriNetUnfolder]: 4032/7791 cut-off events. [2023-08-30 00:50:24,710 INFO L131 PetriNetUnfolder]: For 626501/626501 co-relation queries the response was YES. [2023-08-30 00:50:24,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101780 conditions, 7791 events. 4032/7791 cut-off events. For 626501/626501 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 61022 event pairs, 35 based on Foata normal form. 54/7845 useless extension candidates. Maximal degree in co-relation 101615. Up to 2271 conditions per place. [2023-08-30 00:50:24,803 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 487 selfloop transitions, 923 changer transitions 260/1670 dead transitions. [2023-08-30 00:50:24,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1670 transitions, 41866 flow [2023-08-30 00:50:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 00:50:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 00:50:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4524 transitions. [2023-08-30 00:50:24,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166513170012894 [2023-08-30 00:50:24,806 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4524 transitions. [2023-08-30 00:50:24,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4524 transitions. [2023-08-30 00:50:24,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:24,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4524 transitions. [2023-08-30 00:50:24,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 74.1639344262295) internal successors, (4524), 61 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:24,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 178.0) internal successors, (11036), 62 states have internal predecessors, (11036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:24,814 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 178.0) internal successors, (11036), 62 states have internal predecessors, (11036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:24,815 INFO L175 Difference]: Start difference. First operand has 519 places, 977 transitions, 22354 flow. Second operand 61 states and 4524 transitions. [2023-08-30 00:50:24,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1670 transitions, 41866 flow [2023-08-30 00:50:27,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1670 transitions, 39895 flow, removed 651 selfloop flow, removed 38 redundant places. [2023-08-30 00:50:27,510 INFO L231 Difference]: Finished difference. Result has 528 places, 1313 transitions, 32415 flow [2023-08-30 00:50:27,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=20897, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=32415, PETRI_PLACES=528, PETRI_TRANSITIONS=1313} [2023-08-30 00:50:27,511 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 499 predicate places. [2023-08-30 00:50:27,511 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 1313 transitions, 32415 flow [2023-08-30 00:50:27,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 71.5) internal successors, (2431), 34 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:27,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:27,512 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:27,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:27,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 00:50:27,712 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:27,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash -826441784, now seen corresponding path program 38 times [2023-08-30 00:50:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954316524] [2023-08-30 00:50:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:27,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:27,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954316524] [2023-08-30 00:50:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954316524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:28,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077886395] [2023-08-30 00:50:28,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:50:28,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:28,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:28,001 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:28,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 00:50:28,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:50:28,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:28,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 00:50:28,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:28,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:28,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077886395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:28,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:28,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-08-30 00:50:28,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895764332] [2023-08-30 00:50:28,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:28,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 00:50:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 00:50:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-08-30 00:50:28,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:50:28,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1313 transitions, 32415 flow. Second operand has 32 states, 32 states have (on average 71.53125) internal successors, (2289), 32 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:28,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:28,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:50:28,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:35,054 INFO L130 PetriNetUnfolder]: 4564/9272 cut-off events. [2023-08-30 00:50:35,054 INFO L131 PetriNetUnfolder]: For 662743/662743 co-relation queries the response was YES. [2023-08-30 00:50:35,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111843 conditions, 9272 events. 4564/9272 cut-off events. For 662743/662743 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 77338 event pairs, 44 based on Foata normal form. 61/9333 useless extension candidates. Maximal degree in co-relation 111682. Up to 5080 conditions per place. [2023-08-30 00:50:35,161 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 1330 selfloop transitions, 440 changer transitions 363/2133 dead transitions. [2023-08-30 00:50:35,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 2133 transitions, 50794 flow [2023-08-30 00:50:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 00:50:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 00:50:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4824 transitions. [2023-08-30 00:50:35,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41694036300777876 [2023-08-30 00:50:35,164 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4824 transitions. [2023-08-30 00:50:35,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4824 transitions. [2023-08-30 00:50:35,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:35,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4824 transitions. [2023-08-30 00:50:35,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 74.21538461538462) internal successors, (4824), 65 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:35,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 178.0) internal successors, (11748), 66 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:35,175 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 178.0) internal successors, (11748), 66 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:35,176 INFO L175 Difference]: Start difference. First operand has 528 places, 1313 transitions, 32415 flow. Second operand 65 states and 4824 transitions. [2023-08-30 00:50:35,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 2133 transitions, 50794 flow [2023-08-30 00:50:39,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 2133 transitions, 48229 flow, removed 577 selfloop flow, removed 45 redundant places. [2023-08-30 00:50:39,318 INFO L231 Difference]: Finished difference. Result has 568 places, 1608 transitions, 37407 flow [2023-08-30 00:50:39,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=30032, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=37407, PETRI_PLACES=568, PETRI_TRANSITIONS=1608} [2023-08-30 00:50:39,319 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 539 predicate places. [2023-08-30 00:50:39,319 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1608 transitions, 37407 flow [2023-08-30 00:50:39,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 71.53125) internal successors, (2289), 32 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:39,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:39,320 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:39,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:39,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 00:50:39,520 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:39,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:39,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2115528213, now seen corresponding path program 39 times [2023-08-30 00:50:39,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:39,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134653622] [2023-08-30 00:50:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:39,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:39,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:39,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134653622] [2023-08-30 00:50:39,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134653622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637630172] [2023-08-30 00:50:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:50:39,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:39,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:39,814 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:39,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 00:50:39,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 00:50:39,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 00:50:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:40,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:50:40,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637630172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:40,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:40,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 31 [2023-08-30 00:50:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596122874] [2023-08-30 00:50:40,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 00:50:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 00:50:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 00:50:40,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:50:40,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1608 transitions, 37407 flow. Second operand has 33 states, 33 states have (on average 71.54545454545455) internal successors, (2361), 33 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:40,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:40,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:50:40,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:47,262 INFO L130 PetriNetUnfolder]: 4944/9899 cut-off events. [2023-08-30 00:50:47,263 INFO L131 PetriNetUnfolder]: For 633540/633540 co-relation queries the response was YES. [2023-08-30 00:50:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120648 conditions, 9899 events. 4944/9899 cut-off events. For 633540/633540 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 83239 event pairs, 65 based on Foata normal form. 20/9919 useless extension candidates. Maximal degree in co-relation 120461. Up to 6100 conditions per place. [2023-08-30 00:50:47,380 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 1276 selfloop transitions, 288 changer transitions 622/2186 dead transitions. [2023-08-30 00:50:47,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 2186 transitions, 56074 flow [2023-08-30 00:50:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-30 00:50:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-30 00:50:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3984 transitions. [2023-08-30 00:50:47,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41448189762796506 [2023-08-30 00:50:47,383 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3984 transitions. [2023-08-30 00:50:47,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3984 transitions. [2023-08-30 00:50:47,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:47,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3984 transitions. [2023-08-30 00:50:47,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 73.77777777777777) internal successors, (3984), 54 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:47,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 178.0) internal successors, (9790), 55 states have internal predecessors, (9790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:47,390 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 178.0) internal successors, (9790), 55 states have internal predecessors, (9790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:47,390 INFO L175 Difference]: Start difference. First operand has 568 places, 1608 transitions, 37407 flow. Second operand 54 states and 3984 transitions. [2023-08-30 00:50:47,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 2186 transitions, 56074 flow [2023-08-30 00:50:51,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 2186 transitions, 55231 flow, removed 366 selfloop flow, removed 46 redundant places. [2023-08-30 00:50:51,768 INFO L231 Difference]: Finished difference. Result has 567 places, 1433 transitions, 34493 flow [2023-08-30 00:50:51,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=36592, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=34493, PETRI_PLACES=567, PETRI_TRANSITIONS=1433} [2023-08-30 00:50:51,769 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 538 predicate places. [2023-08-30 00:50:51,769 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1433 transitions, 34493 flow [2023-08-30 00:50:51,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 71.54545454545455) internal successors, (2361), 33 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:51,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:51,770 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:51,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:51,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 00:50:51,970 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:51,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash 756376304, now seen corresponding path program 40 times [2023-08-30 00:50:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697433655] [2023-08-30 00:50:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:51,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:52,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:52,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697433655] [2023-08-30 00:50:52,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697433655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:52,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409743997] [2023-08-30 00:50:52,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:50:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:52,214 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:52,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 00:50:52,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:50:52,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 00:50:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:52,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:50:52,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409743997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:52,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:52,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 35 [2023-08-30 00:50:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823978422] [2023-08-30 00:50:52,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:52,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 00:50:52,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 00:50:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 00:50:53,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:50:53,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1433 transitions, 34493 flow. Second operand has 37 states, 37 states have (on average 71.48648648648648) internal successors, (2645), 37 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:53,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:53,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:50:53,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:59,687 INFO L130 PetriNetUnfolder]: 4935/9960 cut-off events. [2023-08-30 00:50:59,688 INFO L131 PetriNetUnfolder]: For 643777/643777 co-relation queries the response was YES. [2023-08-30 00:50:59,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123418 conditions, 9960 events. 4935/9960 cut-off events. For 643777/643777 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 85106 event pairs, 67 based on Foata normal form. 26/9986 useless extension candidates. Maximal degree in co-relation 123239. Up to 4878 conditions per place. [2023-08-30 00:50:59,825 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 1041 selfloop transitions, 800 changer transitions 213/2054 dead transitions. [2023-08-30 00:50:59,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 2054 transitions, 56116 flow [2023-08-30 00:50:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 00:50:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 00:50:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3631 transitions. [2023-08-30 00:50:59,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41630360009172207 [2023-08-30 00:50:59,829 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3631 transitions. [2023-08-30 00:50:59,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3631 transitions. [2023-08-30 00:50:59,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:59,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3631 transitions. [2023-08-30 00:50:59,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 74.10204081632654) internal successors, (3631), 49 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,838 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 178.0) internal successors, (8900), 50 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:59,838 INFO L175 Difference]: Start difference. First operand has 567 places, 1433 transitions, 34493 flow. Second operand 49 states and 3631 transitions. [2023-08-30 00:50:59,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 2054 transitions, 56116 flow [2023-08-30 00:51:03,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 2054 transitions, 51372 flow, removed 2038 selfloop flow, removed 63 redundant places. [2023-08-30 00:51:03,987 INFO L231 Difference]: Finished difference. Result has 514 places, 1736 transitions, 44296 flow [2023-08-30 00:51:03,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=31931, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=44296, PETRI_PLACES=514, PETRI_TRANSITIONS=1736} [2023-08-30 00:51:03,989 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 485 predicate places. [2023-08-30 00:51:03,989 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1736 transitions, 44296 flow [2023-08-30 00:51:03,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 71.48648648648648) internal successors, (2645), 37 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:03,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:03,989 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:51:03,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 00:51:04,190 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:51:04,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash 167905333, now seen corresponding path program 41 times [2023-08-30 00:51:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:51:04,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891523894] [2023-08-30 00:51:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:51:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 00:51:04,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:51:04,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891523894] [2023-08-30 00:51:04,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891523894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:51:04,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367871651] [2023-08-30 00:51:04,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:51:04,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:51:04,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:51:04,486 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:51:04,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 00:51:04,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 00:51:04,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:04,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 00:51:04,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:04,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:51:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367871651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:05,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:51:05,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 35 [2023-08-30 00:51:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634061411] [2023-08-30 00:51:05,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:05,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 00:51:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:51:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 00:51:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2023-08-30 00:51:05,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:51:05,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1736 transitions, 44296 flow. Second operand has 37 states, 37 states have (on average 71.54054054054055) internal successors, (2647), 37 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:05,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:05,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:51:05,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:12,120 INFO L130 PetriNetUnfolder]: 4704/9410 cut-off events. [2023-08-30 00:51:12,121 INFO L131 PetriNetUnfolder]: For 584310/584310 co-relation queries the response was YES. [2023-08-30 00:51:12,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118224 conditions, 9410 events. 4704/9410 cut-off events. For 584310/584310 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 78566 event pairs, 67 based on Foata normal form. 15/9425 useless extension candidates. Maximal degree in co-relation 118046. Up to 3798 conditions per place. [2023-08-30 00:51:12,264 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 626 selfloop transitions, 43 changer transitions 1219/1888 dead transitions. [2023-08-30 00:51:12,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1888 transitions, 51637 flow [2023-08-30 00:51:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 00:51:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 00:51:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2734 transitions. [2023-08-30 00:51:12,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415122988156696 [2023-08-30 00:51:12,269 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2734 transitions. [2023-08-30 00:51:12,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2734 transitions. [2023-08-30 00:51:12,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:12,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2734 transitions. [2023-08-30 00:51:12,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.89189189189189) internal successors, (2734), 37 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:12,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 178.0) internal successors, (6764), 38 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:12,276 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 178.0) internal successors, (6764), 38 states have internal predecessors, (6764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:12,276 INFO L175 Difference]: Start difference. First operand has 514 places, 1736 transitions, 44296 flow. Second operand 37 states and 2734 transitions. [2023-08-30 00:51:12,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1888 transitions, 51637 flow [2023-08-30 00:51:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1888 transitions, 48849 flow, removed 1184 selfloop flow, removed 35 redundant places. [2023-08-30 00:51:17,710 INFO L231 Difference]: Finished difference. Result has 499 places, 652 transitions, 12999 flow [2023-08-30 00:51:17,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=41950, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=12999, PETRI_PLACES=499, PETRI_TRANSITIONS=652} [2023-08-30 00:51:17,711 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 470 predicate places. [2023-08-30 00:51:17,712 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 652 transitions, 12999 flow [2023-08-30 00:51:17,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 71.54054054054055) internal successors, (2647), 37 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:17,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:17,712 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:51:17,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:51:17,913 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:51:17,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1690615057, now seen corresponding path program 42 times [2023-08-30 00:51:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:51:17,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285168422] [2023-08-30 00:51:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:17,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:51:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:51:18,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:51:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285168422] [2023-08-30 00:51:18,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285168422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:51:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192235999] [2023-08-30 00:51:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:51:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:51:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:51:18,179 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:51:18,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 00:51:18,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 00:51:18,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 00:51:18,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:18,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:18,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192235999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:18,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:51:18,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2023-08-30 00:51:18,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112744380] [2023-08-30 00:51:18,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:18,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 00:51:18,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:51:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 00:51:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-08-30 00:51:19,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:51:19,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 652 transitions, 12999 flow. Second operand has 39 states, 39 states have (on average 71.51282051282051) internal successors, (2789), 39 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:19,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:19,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:51:19,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:24,645 INFO L130 PetriNetUnfolder]: 4392/9267 cut-off events. [2023-08-30 00:51:24,645 INFO L131 PetriNetUnfolder]: For 566098/566098 co-relation queries the response was YES. [2023-08-30 00:51:24,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98415 conditions, 9267 events. 4392/9267 cut-off events. For 566098/566098 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 80388 event pairs, 0 based on Foata normal form. 38/9305 useless extension candidates. Maximal degree in co-relation 98251. Up to 3243 conditions per place. [2023-08-30 00:51:24,780 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 153 selfloop transitions, 1226 changer transitions 222/1601 dead transitions. [2023-08-30 00:51:24,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1601 transitions, 33934 flow [2023-08-30 00:51:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-30 00:51:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-30 00:51:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5244 transitions. [2023-08-30 00:51:24,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41493907263807567 [2023-08-30 00:51:24,784 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5244 transitions. [2023-08-30 00:51:24,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5244 transitions. [2023-08-30 00:51:24,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:24,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5244 transitions. [2023-08-30 00:51:24,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 73.85915492957747) internal successors, (5244), 71 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 178.0) internal successors, (12816), 72 states have internal predecessors, (12816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,227 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 178.0) internal successors, (12816), 72 states have internal predecessors, (12816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:25,227 INFO L175 Difference]: Start difference. First operand has 499 places, 652 transitions, 12999 flow. Second operand 71 states and 5244 transitions. [2023-08-30 00:51:25,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1601 transitions, 33934 flow [2023-08-30 00:51:27,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1601 transitions, 31801 flow, removed 622 selfloop flow, removed 79 redundant places. [2023-08-30 00:51:27,526 INFO L231 Difference]: Finished difference. Result has 344 places, 1302 transitions, 28198 flow [2023-08-30 00:51:27,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=11968, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=28198, PETRI_PLACES=344, PETRI_TRANSITIONS=1302} [2023-08-30 00:51:27,527 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 315 predicate places. [2023-08-30 00:51:27,527 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1302 transitions, 28198 flow [2023-08-30 00:51:27,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.51282051282051) internal successors, (2789), 39 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:27,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:27,527 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:51:27,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:27,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 00:51:27,728 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:51:27,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -548864286, now seen corresponding path program 43 times [2023-08-30 00:51:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:51:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494512119] [2023-08-30 00:51:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:51:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:28,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:51:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494512119] [2023-08-30 00:51:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494512119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:51:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878846624] [2023-08-30 00:51:28,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:51:28,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:51:28,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:51:28,006 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:51:28,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 00:51:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 00:51:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:28,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:51:28,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878846624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:28,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:51:28,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2023-08-30 00:51:28,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659620157] [2023-08-30 00:51:28,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:28,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-30 00:51:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:51:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-30 00:51:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2023-08-30 00:51:29,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 178 [2023-08-30 00:51:29,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1302 transitions, 28198 flow. Second operand has 42 states, 42 states have (on average 71.42857142857143) internal successors, (3000), 42 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:29,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:29,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 178 [2023-08-30 00:51:29,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:33,894 INFO L130 PetriNetUnfolder]: 3634/7788 cut-off events. [2023-08-30 00:51:33,895 INFO L131 PetriNetUnfolder]: For 217659/217659 co-relation queries the response was YES. [2023-08-30 00:51:33,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78090 conditions, 7788 events. 3634/7788 cut-off events. For 217659/217659 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 66539 event pairs, 0 based on Foata normal form. 49/7835 useless extension candidates. Maximal degree in co-relation 77958. Up to 2855 conditions per place. [2023-08-30 00:51:33,962 INFO L137 encePairwiseOnDemand]: 170/178 looper letters, 0 selfloop transitions, 0 changer transitions 1490/1490 dead transitions. [2023-08-30 00:51:33,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1490 transitions, 33920 flow [2023-08-30 00:51:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 00:51:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 00:51:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3759 transitions. [2023-08-30 00:51:33,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140779907468605 [2023-08-30 00:51:33,965 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3759 transitions. [2023-08-30 00:51:33,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3759 transitions. [2023-08-30 00:51:33,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:33,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3759 transitions. [2023-08-30 00:51:33,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 73.70588235294117) internal successors, (3759), 51 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:33,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:33,972 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 178.0) internal successors, (9256), 52 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:33,972 INFO L175 Difference]: Start difference. First operand has 344 places, 1302 transitions, 28198 flow. Second operand 51 states and 3759 transitions. [2023-08-30 00:51:33,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1490 transitions, 33920 flow [2023-08-30 00:51:35,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1490 transitions, 31601 flow, removed 674 selfloop flow, removed 50 redundant places. [2023-08-30 00:51:35,942 INFO L231 Difference]: Finished difference. Result has 316 places, 0 transitions, 0 flow [2023-08-30 00:51:35,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=26101, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=0, PETRI_PLACES=316, PETRI_TRANSITIONS=0} [2023-08-30 00:51:35,942 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2023-08-30 00:51:35,943 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 0 transitions, 0 flow [2023-08-30 00:51:35,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 71.42857142857143) internal successors, (3000), 42 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:35,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-08-30 00:51:35,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-08-30 00:51:35,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-30 00:51:35,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-30 00:51:35,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-08-30 00:51:35,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-30 00:51:35,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-08-30 00:51:35,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-08-30 00:51:35,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-08-30 00:51:35,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-08-30 00:51:35,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-08-30 00:51:35,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2023-08-30 00:51:35,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:36,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 00:51:36,147 INFO L445 BasicCegarLoop]: Path program histogram: [43, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:51:36,151 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 00:51:36,152 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 00:51:36,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 12:51:36 BasicIcfg [2023-08-30 00:51:36,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 00:51:36,159 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 00:51:36,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 00:51:36,160 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 00:51:36,160 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:47:52" (3/4) ... [2023-08-30 00:51:36,162 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 00:51:36,168 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 00:51:36,168 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 00:51:36,174 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2023-08-30 00:51:36,180 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 00:51:36,181 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-30 00:51:36,181 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 00:51:36,223 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 00:51:36,224 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 00:51:36,224 INFO L158 Benchmark]: Toolchain (without parser) took 224857.71ms. Allocated memory was 67.1MB in the beginning and 8.0GB in the end (delta: 8.0GB). Free memory was 37.6MB in the beginning and 3.9GB in the end (delta: -3.9GB). Peak memory consumption was 4.1GB. Max. memory is 16.1GB. [2023-08-30 00:51:36,224 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:51:36,225 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.53ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 37.3MB in the beginning and 78.9MB in the end (delta: -41.7MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2023-08-30 00:51:36,225 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.97ms. Allocated memory is still 98.6MB. Free memory was 78.9MB in the beginning and 77.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 00:51:36,225 INFO L158 Benchmark]: Boogie Preprocessor took 38.37ms. Allocated memory is still 98.6MB. Free memory was 77.3MB in the beginning and 76.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 00:51:36,225 INFO L158 Benchmark]: RCFGBuilder took 459.43ms. Allocated memory is still 98.6MB. Free memory was 76.0MB in the beginning and 60.6MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-08-30 00:51:36,226 INFO L158 Benchmark]: TraceAbstraction took 223968.24ms. Allocated memory was 98.6MB in the beginning and 8.0GB in the end (delta: 7.9GB). Free memory was 59.7MB in the beginning and 3.9GB in the end (delta: -3.9GB). Peak memory consumption was 4.3GB. Max. memory is 16.1GB. [2023-08-30 00:51:36,226 INFO L158 Benchmark]: Witness Printer took 64.35ms. Allocated memory is still 8.0GB. Free memory was 3.9GB in the beginning and 3.9GB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 00:51:36,228 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory is still 45.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.53ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 37.3MB in the beginning and 78.9MB in the end (delta: -41.7MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.97ms. Allocated memory is still 98.6MB. Free memory was 78.9MB in the beginning and 77.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.37ms. Allocated memory is still 98.6MB. Free memory was 77.3MB in the beginning and 76.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 459.43ms. Allocated memory is still 98.6MB. Free memory was 76.0MB in the beginning and 60.6MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 223968.24ms. Allocated memory was 98.6MB in the beginning and 8.0GB in the end (delta: 7.9GB). Free memory was 59.7MB in the beginning and 3.9GB in the end (delta: -3.9GB). Peak memory consumption was 4.3GB. Max. memory is 16.1GB. * Witness Printer took 64.35ms. Allocated memory is still 8.0GB. Free memory was 3.9GB in the beginning and 3.9GB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 88 PlacesBefore, 29 PlacesAfterwards, 87 TransitionsBefore, 24 TransitionsAfterwards, 540 CoEnabledTransitionPairs, 6 FixpointIterations, 53 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 85 TotalNumberOfCompositions, 633 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 621, independent: 619, independent conditional: 0, independent unconditional: 619, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 278, independent: 276, independent conditional: 0, independent unconditional: 276, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 621, independent: 343, independent conditional: 0, independent unconditional: 343, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 278, unknown conditional: 0, unknown unconditional: 278] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 78]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 64]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 105 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 223.8s, OverallIterations: 50, TraceHistogramMax: 8, PathProgramHistogramMax: 43, EmptinessCheckTime: 0.0s, AutomataDifference: 177.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12051 SdHoareTripleChecker+Valid, 25.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11467 mSDsluCounter, 10584 SdHoareTripleChecker+Invalid, 21.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10320 mSDsCounter, 2060 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 61812 IncrementalHoareTripleChecker+Invalid, 63872 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2060 mSolverCounterUnsat, 264 mSDtfsCounter, 61812 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3087 GetRequests, 723 SyntacticMatches, 56 SemanticMatches, 2308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42205 ImplicationChecksByTransitivity, 44.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44296occurred in iteration=47, InterpolantAutomatonStates: 1623, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 30.1s InterpolantComputationTime, 1552 NumberOfCodeBlocks, 1552 NumberOfCodeBlocksAsserted, 157 NumberOfCheckSat, 2175 ConstructedInterpolants, 0 QuantifiedInterpolants, 27697 SizeOfPredicates, 269 NumberOfNonLiveVariables, 6194 ConjunctsInSsa, 1176 ConjunctsInUnsatCore, 138 InterpolantComputations, 6 PerfectInterpolantSequences, 58/1167 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 00:51:36,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE