./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/clever.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/clever.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 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:57:05,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:57:05,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:57:05,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:57:05,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:57:05,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:57:05,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:57:05,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:57:05,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:57:05,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:57:05,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:57:05,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:57:05,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:57:05,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:57:05,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:57:05,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:57:05,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:57:05,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:57:05,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:57:05,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:57:05,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:57:05,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:57:05,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:57:05,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:57:05,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:57:05,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:57:05,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:57:05,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:57:05,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:57:05,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:57:05,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:57:05,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:57:05,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:57:05,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:57:05,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:57:05,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:57:05,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:57:05,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:57:05,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:57:05,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:57:05,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:57:05,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:57:05,674 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:57:05,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:57:05,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:57:05,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:57:05,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:57:05,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:57:05,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:57:05,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:57:05,678 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:57:05,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:57:05,679 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:57:05,679 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:57:05,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:57:05,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:57:05,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:57:05,680 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:57:05,680 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:57:05,680 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:57:05,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:57:05,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:57:05,680 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:57:05,681 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:57:05,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:57:05,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:57:05,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:57:05,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:57:05,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:57:05,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:57:05,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:57:05,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:57:05,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:57:05,683 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:57:05,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:57:05,683 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:57:05,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:57:06,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:57:06,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:57:06,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:57:06,047 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:57:06,048 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:57:06,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-09-01 01:57:07,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:57:07,478 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:57:07,478 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-09-01 01:57:07,487 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cdab2b2d/e36ce4e8514b48228e816d4ebc167385/FLAGc005baa4e [2023-09-01 01:57:07,504 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cdab2b2d/e36ce4e8514b48228e816d4ebc167385 [2023-09-01 01:57:07,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:57:07,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:57:07,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:57:07,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:57:07,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:57:07,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae86111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07, skipping insertion in model container [2023-09-01 01:57:07,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:57:07,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:57:07,717 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/clever.wvr.c[2133,2146] [2023-09-01 01:57:07,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:57:07,732 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:57:07,764 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/clever.wvr.c[2133,2146] [2023-09-01 01:57:07,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:57:07,782 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:57:07,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07 WrapperNode [2023-09-01 01:57:07,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:57:07,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:57:07,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:57:07,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:57:07,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,831 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-09-01 01:57:07,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:57:07,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:57:07,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:57:07,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:57:07,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,870 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:57:07,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:57:07,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:57:07,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:57:07,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (1/1) ... [2023-09-01 01:57:07,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:57:07,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:07,905 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) [2023-09-01 01:57:07,913 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 [2023-09-01 01:57:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:57:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:57:07,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:57:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:57:07,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:57:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 01:57:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:57:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 01:57:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:57:07,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:57:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 01:57:07,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:57:07,943 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:57:08,024 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:57:08,026 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:57:08,260 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:57:08,267 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:57:08,267 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 01:57:08,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:57:08 BoogieIcfgContainer [2023-09-01 01:57:08,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:57:08,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:57:08,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:57:08,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:57:08,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:57:07" (1/3) ... [2023-09-01 01:57:08,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9921e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:57:08, skipping insertion in model container [2023-09-01 01:57:08,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:57:07" (2/3) ... [2023-09-01 01:57:08,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9921e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:57:08, skipping insertion in model container [2023-09-01 01:57:08,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:57:08" (3/3) ... [2023-09-01 01:57:08,276 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-09-01 01:57:08,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:57:08,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 01:57:08,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:57:08,400 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:57:08,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 278 flow [2023-09-01 01:57:08,504 INFO L130 PetriNetUnfolder]: 9/129 cut-off events. [2023-09-01 01:57:08,504 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:57:08,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 9/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-09-01 01:57:08,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 131 transitions, 278 flow [2023-09-01 01:57:08,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 125 transitions, 262 flow [2023-09-01 01:57:08,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:57:08,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 125 transitions, 262 flow [2023-09-01 01:57:08,527 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 125 transitions, 262 flow [2023-09-01 01:57:08,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 125 transitions, 262 flow [2023-09-01 01:57:08,554 INFO L130 PetriNetUnfolder]: 9/125 cut-off events. [2023-09-01 01:57:08,555 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:57:08,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 9/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-09-01 01:57:08,557 INFO L119 LiptonReduction]: Number of co-enabled transitions 972 [2023-09-01 01:57:12,686 INFO L134 LiptonReduction]: Checked pairs total: 946 [2023-09-01 01:57:12,687 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-09-01 01:57:12,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:57:12,716 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;@3240276a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:57:12,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 01:57:12,718 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 01:57:12,719 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:57:12,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:12,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 01:57:12,721 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)] === [2023-09-01 01:57:12,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash 486, now seen corresponding path program 1 times [2023-09-01 01:57:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:12,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182327706] [2023-09-01 01:57:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:12,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:12,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:12,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182327706] [2023-09-01 01:57:12,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182327706] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:12,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:12,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 01:57:12,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189201134] [2023-09-01 01:57:12,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 01:57:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 01:57:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 01:57:12,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 258 [2023-09-01 01:57:12,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 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) [2023-09-01 01:57:12,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:12,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 258 [2023-09-01 01:57:12,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:12,889 INFO L130 PetriNetUnfolder]: 75/122 cut-off events. [2023-09-01 01:57:12,889 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 01:57:12,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 122 events. 75/122 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 266 event pairs, 35 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 210. Up to 123 conditions per place. [2023-09-01 01:57:12,892 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-09-01 01:57:12,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 96 flow [2023-09-01 01:57:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 01:57:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 01:57:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 264 transitions. [2023-09-01 01:57:12,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2023-09-01 01:57:12,904 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 264 transitions. [2023-09-01 01:57:12,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 264 transitions. [2023-09-01 01:57:12,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:12,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 264 transitions. [2023-09-01 01:57:12,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 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) [2023-09-01 01:57:12,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 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) [2023-09-01 01:57:12,915 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 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) [2023-09-01 01:57:12,916 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 60 flow. Second operand 2 states and 264 transitions. [2023-09-01 01:57:12,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 96 flow [2023-09-01 01:57:12,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:57:12,920 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2023-09-01 01:57:12,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, 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=22, PETRI_TRANSITIONS=21} [2023-09-01 01:57:12,926 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-09-01 01:57:12,926 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2023-09-01 01:57:12,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 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) [2023-09-01 01:57:12,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:12,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:57:12,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 01:57:12,927 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)] === [2023-09-01 01:57:12,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash 478579, now seen corresponding path program 1 times [2023-09-01 01:57:12,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238810084] [2023-09-01 01:57:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:13,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238810084] [2023-09-01 01:57:13,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238810084] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:13,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:13,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:57:13,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892277400] [2023-09-01 01:57:13,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:13,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:57:13,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:57:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:57:13,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 258 [2023-09-01 01:57:13,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2023-09-01 01:57:13,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:13,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 258 [2023-09-01 01:57:13,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:13,207 INFO L130 PetriNetUnfolder]: 69/111 cut-off events. [2023-09-01 01:57:13,208 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:57:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 111 events. 69/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 236 event pairs, 32 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 226. Up to 111 conditions per place. [2023-09-01 01:57:13,209 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-09-01 01:57:13,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 80 flow [2023-09-01 01:57:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-09-01 01:57:13,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2023-09-01 01:57:13,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-09-01 01:57:13,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-09-01 01:57:13,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:13,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-09-01 01:57:13,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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) [2023-09-01 01:57:13,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,217 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 366 transitions. [2023-09-01 01:57:13,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 80 flow [2023-09-01 01:57:13,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 01:57:13,218 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 44 flow [2023-09-01 01:57:13,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=22, PETRI_TRANSITIONS=19} [2023-09-01 01:57:13,219 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-09-01 01:57:13,219 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 44 flow [2023-09-01 01:57:13,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2023-09-01 01:57:13,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:13,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:57:13,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 01:57:13,220 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)] === [2023-09-01 01:57:13,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash 478578, now seen corresponding path program 1 times [2023-09-01 01:57:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:13,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200919106] [2023-09-01 01:57:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:13,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:13,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200919106] [2023-09-01 01:57:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200919106] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:13,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:13,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:57:13,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396340835] [2023-09-01 01:57:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:13,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:57:13,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:57:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:57:13,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 258 [2023-09-01 01:57:13,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2023-09-01 01:57:13,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:13,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 258 [2023-09-01 01:57:13,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:13,389 INFO L130 PetriNetUnfolder]: 63/100 cut-off events. [2023-09-01 01:57:13,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:57:13,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 100 events. 63/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 200 event pairs, 29 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 205. Up to 100 conditions per place. [2023-09-01 01:57:13,390 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 01:57:13,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2023-09-01 01:57:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-09-01 01:57:13,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2023-09-01 01:57:13,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-09-01 01:57:13,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-09-01 01:57:13,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:13,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-09-01 01:57:13,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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) [2023-09-01 01:57:13,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,397 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 44 flow. Second operand 3 states and 352 transitions. [2023-09-01 01:57:13,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2023-09-01 01:57:13,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:13,398 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 41 flow [2023-09-01 01:57:13,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=21, PETRI_TRANSITIONS=17} [2023-09-01 01:57:13,398 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2023-09-01 01:57:13,399 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 41 flow [2023-09-01 01:57:13,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2023-09-01 01:57:13,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:13,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:57:13,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 01:57:13,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:57:13,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash 459922979, now seen corresponding path program 1 times [2023-09-01 01:57:13,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:13,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667579294] [2023-09-01 01:57:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:13,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:13,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667579294] [2023-09-01 01:57:13,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667579294] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:13,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:13,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:57:13,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629482829] [2023-09-01 01:57:13,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:13,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:57:13,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:57:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:57:13,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 258 [2023-09-01 01:57:13,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 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) [2023-09-01 01:57:13,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:13,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 258 [2023-09-01 01:57:13,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:13,620 INFO L130 PetriNetUnfolder]: 49/80 cut-off events. [2023-09-01 01:57:13,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:57:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 80 events. 49/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 141 event pairs, 22 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 166. Up to 80 conditions per place. [2023-09-01 01:57:13,623 INFO L137 encePairwiseOnDemand]: 256/258 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-09-01 01:57:13,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 16 transitions, 71 flow [2023-09-01 01:57:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-09-01 01:57:13,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2023-09-01 01:57:13,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-09-01 01:57:13,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-09-01 01:57:13,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:13,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-09-01 01:57:13,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2023-09-01 01:57:13,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,636 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 41 flow. Second operand 3 states and 356 transitions. [2023-09-01 01:57:13,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 16 transitions, 71 flow [2023-09-01 01:57:13,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:13,637 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 40 flow [2023-09-01 01:57:13,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=21, PETRI_TRANSITIONS=16} [2023-09-01 01:57:13,639 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2023-09-01 01:57:13,639 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 40 flow [2023-09-01 01:57:13,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 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) [2023-09-01 01:57:13,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:13,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 01:57:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 01:57:13,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 01:57:13,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash 459922978, now seen corresponding path program 1 times [2023-09-01 01:57:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:13,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105299985] [2023-09-01 01:57:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:13,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105299985] [2023-09-01 01:57:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105299985] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:13,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:13,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:57:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879353800] [2023-09-01 01:57:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:13,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:57:13,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:57:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:57:13,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 258 [2023-09-01 01:57:13,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 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) [2023-09-01 01:57:13,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:13,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 258 [2023-09-01 01:57:13,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:13,802 INFO L130 PetriNetUnfolder]: 35/60 cut-off events. [2023-09-01 01:57:13,802 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:57:13,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 60 events. 35/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 15 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 127. Up to 60 conditions per place. [2023-09-01 01:57:13,805 INFO L137 encePairwiseOnDemand]: 256/258 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-09-01 01:57:13,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 15 transitions, 68 flow [2023-09-01 01:57:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2023-09-01 01:57:13,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354005167958656 [2023-09-01 01:57:13,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2023-09-01 01:57:13,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2023-09-01 01:57:13,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:13,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2023-09-01 01:57:13,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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) [2023-09-01 01:57:13,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:13,811 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 40 flow. Second operand 3 states and 337 transitions. [2023-09-01 01:57:13,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 15 transitions, 68 flow [2023-09-01 01:57:13,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:13,812 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 39 flow [2023-09-01 01:57:13,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=21, PETRI_TRANSITIONS=15} [2023-09-01 01:57:13,814 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2023-09-01 01:57:13,814 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 39 flow [2023-09-01 01:57:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 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) [2023-09-01 01:57:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:13,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 01:57:13,816 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)] === [2023-09-01 01:57:13,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1323423244, now seen corresponding path program 1 times [2023-09-01 01:57:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415252243] [2023-09-01 01:57:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:13,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:13,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415252243] [2023-09-01 01:57:13,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415252243] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:13,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:13,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:57:13,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457896541] [2023-09-01 01:57:13,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:13,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:57:13,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:57:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:57:13,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2023-09-01 01:57:13,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2023-09-01 01:57:13,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:13,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2023-09-01 01:57:13,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:14,042 INFO L130 PetriNetUnfolder]: 69/117 cut-off events. [2023-09-01 01:57:14,042 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:57:14,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 117 events. 69/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 287 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 245. Up to 73 conditions per place. [2023-09-01 01:57:14,043 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-09-01 01:57:14,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 120 flow [2023-09-01 01:57:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:57:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:57:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-09-01 01:57:14,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2023-09-01 01:57:14,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-09-01 01:57:14,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-09-01 01:57:14,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:14,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-09-01 01:57:14,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2023-09-01 01:57:14,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:14,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-09-01 01:57:14,049 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 39 flow. Second operand 3 states and 370 transitions. [2023-09-01 01:57:14,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 120 flow [2023-09-01 01:57:14,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:14,050 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 57 flow [2023-09-01 01:57:14,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=38, 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-09-01 01:57:14,052 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-09-01 01:57:14,053 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 57 flow [2023-09-01 01:57:14,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2023-09-01 01:57:14,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:14,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:14,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 01:57:14,054 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)] === [2023-09-01 01:57:14,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1533294240, now seen corresponding path program 1 times [2023-09-01 01:57:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:14,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633409328] [2023-09-01 01:57:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:14,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:14,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633409328] [2023-09-01 01:57:14,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633409328] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:14,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:14,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:57:14,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779978833] [2023-09-01 01:57:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:14,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:57:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:57:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:57:14,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:57:14,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2023-09-01 01:57:14,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:14,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:57:14,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:14,237 INFO L130 PetriNetUnfolder]: 125/216 cut-off events. [2023-09-01 01:57:14,238 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-09-01 01:57:14,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 216 events. 125/216 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 680 event pairs, 11 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 522. Up to 79 conditions per place. [2023-09-01 01:57:14,239 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 40 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2023-09-01 01:57:14,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 49 transitions, 246 flow [2023-09-01 01:57:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:57:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:57:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 584 transitions. [2023-09-01 01:57:14,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45271317829457364 [2023-09-01 01:57:14,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 584 transitions. [2023-09-01 01:57:14,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 584 transitions. [2023-09-01 01:57:14,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:14,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 584 transitions. [2023-09-01 01:57:14,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 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) [2023-09-01 01:57:14,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:14,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:14,246 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 57 flow. Second operand 5 states and 584 transitions. [2023-09-01 01:57:14,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 49 transitions, 246 flow [2023-09-01 01:57:14,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:14,248 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 105 flow [2023-09-01 01:57:14,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-09-01 01:57:14,249 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-09-01 01:57:14,249 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 105 flow [2023-09-01 01:57:14,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2023-09-01 01:57:14,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:14,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:14,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 01:57:14,250 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)] === [2023-09-01 01:57:14,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1474401878, now seen corresponding path program 2 times [2023-09-01 01:57:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:14,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936210] [2023-09-01 01:57:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:14,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936210] [2023-09-01 01:57:14,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936210] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:14,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:14,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:57:14,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710568096] [2023-09-01 01:57:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:14,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:57:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:57:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:57:14,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:57:14,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2023-09-01 01:57:14,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:14,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:57:14,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:14,385 INFO L130 PetriNetUnfolder]: 125/210 cut-off events. [2023-09-01 01:57:14,385 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-09-01 01:57:14,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 210 events. 125/210 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 638 event pairs, 17 based on Foata normal form. 4/214 useless extension candidates. Maximal degree in co-relation 654. Up to 92 conditions per place. [2023-09-01 01:57:14,387 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 32 selfloop transitions, 11 changer transitions 6/49 dead transitions. [2023-09-01 01:57:14,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 305 flow [2023-09-01 01:57:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:57:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:57:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-09-01 01:57:14,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2023-09-01 01:57:14,390 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-09-01 01:57:14,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-09-01 01:57:14,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:14,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-09-01 01:57:14,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 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) [2023-09-01 01:57:14,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:14,394 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:14,394 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 105 flow. Second operand 5 states and 579 transitions. [2023-09-01 01:57:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 305 flow [2023-09-01 01:57:14,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 305 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 01:57:14,397 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 170 flow [2023-09-01 01:57:14,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-09-01 01:57:14,398 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2023-09-01 01:57:14,398 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 170 flow [2023-09-01 01:57:14,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2023-09-01 01:57:14,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:14,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:14,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 01:57:14,399 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)] === [2023-09-01 01:57:14,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1824564861, now seen corresponding path program 1 times [2023-09-01 01:57:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520841708] [2023-09-01 01:57:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:14,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520841708] [2023-09-01 01:57:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520841708] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332672764] [2023-09-01 01:57:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:14,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:14,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:14,481 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) [2023-09-01 01:57:14,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 01:57:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 01:57:14,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:14,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:14,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332672764] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:14,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:14,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 01:57:14,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534121679] [2023-09-01 01:57:14,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:14,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:57:14,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:14,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:57:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:57:14,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:57:14,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 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) [2023-09-01 01:57:14,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:14,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:57:14,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:14,904 INFO L130 PetriNetUnfolder]: 131/230 cut-off events. [2023-09-01 01:57:14,904 INFO L131 PetriNetUnfolder]: For 345/345 co-relation queries the response was YES. [2023-09-01 01:57:14,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 230 events. 131/230 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 731 event pairs, 2 based on Foata normal form. 20/250 useless extension candidates. Maximal degree in co-relation 861. Up to 96 conditions per place. [2023-09-01 01:57:14,906 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 43 selfloop transitions, 9 changer transitions 4/56 dead transitions. [2023-09-01 01:57:14,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 419 flow [2023-09-01 01:57:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:57:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:57:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-09-01 01:57:14,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45193798449612405 [2023-09-01 01:57:14,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-09-01 01:57:14,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-09-01 01:57:14,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:14,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-09-01 01:57:14,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 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) [2023-09-01 01:57:14,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:14,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:14,914 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 170 flow. Second operand 5 states and 583 transitions. [2023-09-01 01:57:14,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 419 flow [2023-09-01 01:57:14,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 413 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-09-01 01:57:14,920 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 242 flow [2023-09-01 01:57:14,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-09-01 01:57:14,922 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2023-09-01 01:57:14,922 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 242 flow [2023-09-01 01:57:14,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 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) [2023-09-01 01:57:14,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:14,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:14,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:15,128 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)] === [2023-09-01 01:57:15,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash -435410164, now seen corresponding path program 1 times [2023-09-01 01:57:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:15,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313781373] [2023-09-01 01:57:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:15,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:15,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313781373] [2023-09-01 01:57:15,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313781373] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661597970] [2023-09-01 01:57:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:15,420 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) [2023-09-01 01:57:15,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 01:57:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:15,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 01:57:15,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:22,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:22,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661597970] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:22,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:22,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-09-01 01:57:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956651142] [2023-09-01 01:57:22,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:57:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:57:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=101, Unknown=3, NotChecked=0, Total=156 [2023-09-01 01:57:24,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:26,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:27,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-09-01 01:57:27,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 98.0) internal successors, (1274), 13 states have internal predecessors, (1274), 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) [2023-09-01 01:57:27,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:27,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-09-01 01:57:27,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:27,662 INFO L130 PetriNetUnfolder]: 260/455 cut-off events. [2023-09-01 01:57:27,663 INFO L131 PetriNetUnfolder]: For 832/832 co-relation queries the response was YES. [2023-09-01 01:57:27,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 455 events. 260/455 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1800 event pairs, 12 based on Foata normal form. 14/469 useless extension candidates. Maximal degree in co-relation 1870. Up to 184 conditions per place. [2023-09-01 01:57:27,667 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 65 selfloop transitions, 19 changer transitions 23/107 dead transitions. [2023-09-01 01:57:27,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 107 transitions, 909 flow [2023-09-01 01:57:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:57:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:57:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 934 transitions. [2023-09-01 01:57:27,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40223944875107664 [2023-09-01 01:57:27,671 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 934 transitions. [2023-09-01 01:57:27,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 934 transitions. [2023-09-01 01:57:27,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:27,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 934 transitions. [2023-09-01 01:57:27,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 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) [2023-09-01 01:57:27,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 258.0) internal successors, (2580), 10 states have internal predecessors, (2580), 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) [2023-09-01 01:57:27,678 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 258.0) internal successors, (2580), 10 states have internal predecessors, (2580), 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) [2023-09-01 01:57:27,678 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 242 flow. Second operand 9 states and 934 transitions. [2023-09-01 01:57:27,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 107 transitions, 909 flow [2023-09-01 01:57:27,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 107 transitions, 899 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 01:57:27,685 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 428 flow [2023-09-01 01:57:27,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-09-01 01:57:27,686 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2023-09-01 01:57:27,686 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 428 flow [2023-09-01 01:57:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.0) internal successors, (1274), 13 states have internal predecessors, (1274), 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) [2023-09-01 01:57:27,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:27,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:27,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:27,893 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,SelfDestructingSolverStorable9 [2023-09-01 01:57:27,893 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)] === [2023-09-01 01:57:27,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash 661680455, now seen corresponding path program 2 times [2023-09-01 01:57:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:27,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034875174] [2023-09-01 01:57:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:27,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:27,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034875174] [2023-09-01 01:57:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034875174] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:57:27,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:57:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:57:27,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059684107] [2023-09-01 01:57:27,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:57:27,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:57:27,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:57:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:57:28,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:57:28,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 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) [2023-09-01 01:57:28,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:28,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:57:28,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:28,123 INFO L130 PetriNetUnfolder]: 204/350 cut-off events. [2023-09-01 01:57:28,123 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2023-09-01 01:57:28,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 350 events. 204/350 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1191 event pairs, 29 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 1632. Up to 152 conditions per place. [2023-09-01 01:57:28,127 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 55 selfloop transitions, 12 changer transitions 2/69 dead transitions. [2023-09-01 01:57:28,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 709 flow [2023-09-01 01:57:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:57:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:57:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2023-09-01 01:57:28,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2023-09-01 01:57:28,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2023-09-01 01:57:28,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2023-09-01 01:57:28,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:28,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2023-09-01 01:57:28,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 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) [2023-09-01 01:57:28,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:28,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:57:28,134 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 428 flow. Second operand 5 states and 576 transitions. [2023-09-01 01:57:28,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 709 flow [2023-09-01 01:57:28,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 652 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-09-01 01:57:28,139 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 464 flow [2023-09-01 01:57:28,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-09-01 01:57:28,140 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 29 predicate places. [2023-09-01 01:57:28,140 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 464 flow [2023-09-01 01:57:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 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) [2023-09-01 01:57:28,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:28,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 01:57:28,141 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)] === [2023-09-01 01:57:28,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash 989482668, now seen corresponding path program 2 times [2023-09-01 01:57:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081929846] [2023-09-01 01:57:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:28,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081929846] [2023-09-01 01:57:28,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081929846] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54362750] [2023-09-01 01:57:28,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:57:28,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:28,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:28,549 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) [2023-09-01 01:57:28,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 01:57:28,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:57:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:57:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:57:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:29,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:29,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54362750] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:29,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:29,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-09-01 01:57:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42137106] [2023-09-01 01:57:29,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:29,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:57:29,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:57:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:57:29,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 01:57:29,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 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) [2023-09-01 01:57:29,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:29,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 01:57:29,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:31,860 INFO L130 PetriNetUnfolder]: 728/1252 cut-off events. [2023-09-01 01:57:31,860 INFO L131 PetriNetUnfolder]: For 5158/5158 co-relation queries the response was YES. [2023-09-01 01:57:31,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5860 conditions, 1252 events. 728/1252 cut-off events. For 5158/5158 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6147 event pairs, 72 based on Foata normal form. 8/1260 useless extension candidates. Maximal degree in co-relation 5836. Up to 337 conditions per place. [2023-09-01 01:57:31,871 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 161 selfloop transitions, 95 changer transitions 12/268 dead transitions. [2023-09-01 01:57:31,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 268 transitions, 2630 flow [2023-09-01 01:57:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 01:57:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 01:57:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2126 transitions. [2023-09-01 01:57:31,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43370053039575684 [2023-09-01 01:57:31,878 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2126 transitions. [2023-09-01 01:57:31,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2126 transitions. [2023-09-01 01:57:31,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:31,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2126 transitions. [2023-09-01 01:57:31,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.89473684210526) internal successors, (2126), 19 states have internal predecessors, (2126), 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) [2023-09-01 01:57:31,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 258.0) internal successors, (5160), 20 states have internal predecessors, (5160), 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) [2023-09-01 01:57:31,892 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 258.0) internal successors, (5160), 20 states have internal predecessors, (5160), 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) [2023-09-01 01:57:31,892 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 464 flow. Second operand 19 states and 2126 transitions. [2023-09-01 01:57:31,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 268 transitions, 2630 flow [2023-09-01 01:57:31,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 268 transitions, 2520 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-09-01 01:57:31,914 INFO L231 Difference]: Finished difference. Result has 86 places, 143 transitions, 1677 flow [2023-09-01 01:57:31,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1677, PETRI_PLACES=86, PETRI_TRANSITIONS=143} [2023-09-01 01:57:31,915 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2023-09-01 01:57:31,915 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 143 transitions, 1677 flow [2023-09-01 01:57:31,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 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) [2023-09-01 01:57:31,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:31,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:31,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:32,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:32,121 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)] === [2023-09-01 01:57:32,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:32,122 INFO L85 PathProgramCache]: Analyzing trace with hash -208889644, now seen corresponding path program 3 times [2023-09-01 01:57:32,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:32,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424069508] [2023-09-01 01:57:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:32,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424069508] [2023-09-01 01:57:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424069508] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:32,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96166944] [2023-09-01 01:57:32,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:57:32,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:32,553 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) [2023-09-01 01:57:32,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 01:57:32,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:57:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:57:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:57:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:33,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96166944] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:33,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:33,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-09-01 01:57:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137226825] [2023-09-01 01:57:33,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:33,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 01:57:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 01:57:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-09-01 01:57:33,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 01:57:33,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 143 transitions, 1677 flow. Second operand has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 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) [2023-09-01 01:57:33,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:33,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 01:57:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:34,602 INFO L130 PetriNetUnfolder]: 1241/2113 cut-off events. [2023-09-01 01:57:34,602 INFO L131 PetriNetUnfolder]: For 11612/11612 co-relation queries the response was YES. [2023-09-01 01:57:34,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 2113 events. 1241/2113 cut-off events. For 11612/11612 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11434 event pairs, 142 based on Foata normal form. 5/2118 useless extension candidates. Maximal degree in co-relation 11522. Up to 646 conditions per place. [2023-09-01 01:57:34,622 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 182 selfloop transitions, 119 changer transitions 11/312 dead transitions. [2023-09-01 01:57:34,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 312 transitions, 4049 flow [2023-09-01 01:57:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:57:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:57:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1108 transitions. [2023-09-01 01:57:34,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294573643410853 [2023-09-01 01:57:34,626 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1108 transitions. [2023-09-01 01:57:34,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1108 transitions. [2023-09-01 01:57:34,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:34,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1108 transitions. [2023-09-01 01:57:34,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 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) [2023-09-01 01:57:34,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 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) [2023-09-01 01:57:34,633 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 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) [2023-09-01 01:57:34,633 INFO L175 Difference]: Start difference. First operand has 86 places, 143 transitions, 1677 flow. Second operand 10 states and 1108 transitions. [2023-09-01 01:57:34,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 312 transitions, 4049 flow [2023-09-01 01:57:34,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 312 transitions, 3715 flow, removed 164 selfloop flow, removed 2 redundant places. [2023-09-01 01:57:34,689 INFO L231 Difference]: Finished difference. Result has 97 places, 218 transitions, 2814 flow [2023-09-01 01:57:34,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2814, PETRI_PLACES=97, PETRI_TRANSITIONS=218} [2023-09-01 01:57:34,690 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 69 predicate places. [2023-09-01 01:57:34,691 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 218 transitions, 2814 flow [2023-09-01 01:57:34,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 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) [2023-09-01 01:57:34,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:34,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:34,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:34,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:34,898 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)] === [2023-09-01 01:57:34,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 952394115, now seen corresponding path program 1 times [2023-09-01 01:57:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:34,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763195147] [2023-09-01 01:57:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:34,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:34,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:34,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763195147] [2023-09-01 01:57:34,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763195147] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:34,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128189308] [2023-09-01 01:57:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:34,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:34,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:34,978 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) [2023-09-01 01:57:34,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 01:57:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:35,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:57:35,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:35,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:35,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128189308] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:35,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:35,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 01:57:35,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181545212] [2023-09-01 01:57:35,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:57:35,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:57:35,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:57:35,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:57:35,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 218 transitions, 2814 flow. Second operand has 10 states, 10 states have (on average 110.7) internal successors, (1107), 10 states have internal predecessors, (1107), 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) [2023-09-01 01:57:35,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:35,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:57:35,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:36,127 INFO L130 PetriNetUnfolder]: 2095/3657 cut-off events. [2023-09-01 01:57:36,127 INFO L131 PetriNetUnfolder]: For 24748/24748 co-relation queries the response was YES. [2023-09-01 01:57:36,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20810 conditions, 3657 events. 2095/3657 cut-off events. For 24748/24748 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23180 event pairs, 31 based on Foata normal form. 76/3733 useless extension candidates. Maximal degree in co-relation 20769. Up to 839 conditions per place. [2023-09-01 01:57:36,201 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 377 selfloop transitions, 142 changer transitions 1/520 dead transitions. [2023-09-01 01:57:36,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 520 transitions, 7187 flow [2023-09-01 01:57:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:57:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:57:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2023-09-01 01:57:36,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44735142118863047 [2023-09-01 01:57:36,206 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2023-09-01 01:57:36,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2023-09-01 01:57:36,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:36,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2023-09-01 01:57:36,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 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) [2023-09-01 01:57:36,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 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) [2023-09-01 01:57:36,216 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 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) [2023-09-01 01:57:36,217 INFO L175 Difference]: Start difference. First operand has 97 places, 218 transitions, 2814 flow. Second operand 12 states and 1385 transitions. [2023-09-01 01:57:36,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 520 transitions, 7187 flow [2023-09-01 01:57:36,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 520 transitions, 6927 flow, removed 105 selfloop flow, removed 6 redundant places. [2023-09-01 01:57:36,301 INFO L231 Difference]: Finished difference. Result has 110 places, 310 transitions, 4643 flow [2023-09-01 01:57:36,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4643, PETRI_PLACES=110, PETRI_TRANSITIONS=310} [2023-09-01 01:57:36,302 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 82 predicate places. [2023-09-01 01:57:36,302 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 310 transitions, 4643 flow [2023-09-01 01:57:36,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.7) internal successors, (1107), 10 states have internal predecessors, (1107), 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) [2023-09-01 01:57:36,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:36,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:36,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:36,508 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,SelfDestructingSolverStorable13 [2023-09-01 01:57:36,509 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)] === [2023-09-01 01:57:36,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash 250208241, now seen corresponding path program 2 times [2023-09-01 01:57:36,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:36,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432747975] [2023-09-01 01:57:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:36,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432747975] [2023-09-01 01:57:36,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432747975] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312603650] [2023-09-01 01:57:36,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:57:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:36,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:36,580 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) [2023-09-01 01:57:36,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 01:57:36,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:57:36,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:57:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:57:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:36,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:57:36,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312603650] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:36,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:36,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-09-01 01:57:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654692990] [2023-09-01 01:57:36,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:36,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:57:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:57:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:57:36,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:57:36,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 310 transitions, 4643 flow. Second operand has 9 states, 9 states have (on average 111.11111111111111) internal successors, (1000), 9 states have internal predecessors, (1000), 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) [2023-09-01 01:57:36,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:36,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:57:36,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:37,946 INFO L130 PetriNetUnfolder]: 2380/4334 cut-off events. [2023-09-01 01:57:37,946 INFO L131 PetriNetUnfolder]: For 38047/38047 co-relation queries the response was YES. [2023-09-01 01:57:37,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27669 conditions, 4334 events. 2380/4334 cut-off events. For 38047/38047 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29526 event pairs, 178 based on Foata normal form. 32/4366 useless extension candidates. Maximal degree in co-relation 27621. Up to 1311 conditions per place. [2023-09-01 01:57:37,992 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 294 selfloop transitions, 275 changer transitions 0/569 dead transitions. [2023-09-01 01:57:37,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 569 transitions, 9052 flow [2023-09-01 01:57:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:57:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:57:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1609 transitions. [2023-09-01 01:57:37,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545957918050944 [2023-09-01 01:57:37,998 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1609 transitions. [2023-09-01 01:57:37,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1609 transitions. [2023-09-01 01:57:37,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:37,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1609 transitions. [2023-09-01 01:57:38,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.92857142857143) internal successors, (1609), 14 states have internal predecessors, (1609), 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) [2023-09-01 01:57:38,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 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) [2023-09-01 01:57:38,019 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 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) [2023-09-01 01:57:38,020 INFO L175 Difference]: Start difference. First operand has 110 places, 310 transitions, 4643 flow. Second operand 14 states and 1609 transitions. [2023-09-01 01:57:38,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 569 transitions, 9052 flow [2023-09-01 01:57:38,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 569 transitions, 8633 flow, removed 203 selfloop flow, removed 2 redundant places. [2023-09-01 01:57:38,260 INFO L231 Difference]: Finished difference. Result has 127 places, 412 transitions, 6800 flow [2023-09-01 01:57:38,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6800, PETRI_PLACES=127, PETRI_TRANSITIONS=412} [2023-09-01 01:57:38,261 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2023-09-01 01:57:38,261 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 412 transitions, 6800 flow [2023-09-01 01:57:38,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.11111111111111) internal successors, (1000), 9 states have internal predecessors, (1000), 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) [2023-09-01 01:57:38,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:38,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:38,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:38,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 01:57:38,464 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)] === [2023-09-01 01:57:38,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1414835732, now seen corresponding path program 3 times [2023-09-01 01:57:38,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:38,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683627575] [2023-09-01 01:57:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:38,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:38,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683627575] [2023-09-01 01:57:38,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683627575] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928355369] [2023-09-01 01:57:38,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:57:38,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:38,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:38,909 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) [2023-09-01 01:57:38,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 01:57:39,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 01:57:39,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:57:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:57:39,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:40,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928355369] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:40,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:40,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 01:57:40,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013906988] [2023-09-01 01:57:40,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 01:57:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 01:57:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-09-01 01:57:41,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 01:57:41,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 412 transitions, 6800 flow. Second operand has 19 states, 19 states have (on average 105.36842105263158) internal successors, (2002), 19 states have internal predecessors, (2002), 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) [2023-09-01 01:57:41,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:41,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 01:57:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:46,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:51,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:57:52,657 INFO L130 PetriNetUnfolder]: 3298/5950 cut-off events. [2023-09-01 01:57:52,658 INFO L131 PetriNetUnfolder]: For 64712/64712 co-relation queries the response was YES. [2023-09-01 01:57:52,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 5950 events. 3298/5950 cut-off events. For 64712/64712 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42191 event pairs, 258 based on Foata normal form. 18/5968 useless extension candidates. Maximal degree in co-relation 40210. Up to 2691 conditions per place. [2023-09-01 01:57:52,718 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 368 selfloop transitions, 434 changer transitions 21/823 dead transitions. [2023-09-01 01:57:52,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 823 transitions, 14470 flow [2023-09-01 01:57:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 01:57:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 01:57:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2759 transitions. [2023-09-01 01:57:52,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277519379844961 [2023-09-01 01:57:52,725 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2759 transitions. [2023-09-01 01:57:52,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2759 transitions. [2023-09-01 01:57:52,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:57:52,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2759 transitions. [2023-09-01 01:57:52,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 110.36) internal successors, (2759), 25 states have internal predecessors, (2759), 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) [2023-09-01 01:57:52,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 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) [2023-09-01 01:57:52,742 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 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) [2023-09-01 01:57:52,743 INFO L175 Difference]: Start difference. First operand has 127 places, 412 transitions, 6800 flow. Second operand 25 states and 2759 transitions. [2023-09-01 01:57:52,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 823 transitions, 14470 flow [2023-09-01 01:57:53,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 823 transitions, 14007 flow, removed 224 selfloop flow, removed 2 redundant places. [2023-09-01 01:57:53,093 INFO L231 Difference]: Finished difference. Result has 157 places, 661 transitions, 12803 flow [2023-09-01 01:57:53,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=6617, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12803, PETRI_PLACES=157, PETRI_TRANSITIONS=661} [2023-09-01 01:57:53,094 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2023-09-01 01:57:53,094 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 661 transitions, 12803 flow [2023-09-01 01:57:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.36842105263158) internal successors, (2002), 19 states have internal predecessors, (2002), 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) [2023-09-01 01:57:53,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:57:53,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:57:53,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 01:57:53,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:53,295 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)] === [2023-09-01 01:57:53,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:57:53,295 INFO L85 PathProgramCache]: Analyzing trace with hash -373306196, now seen corresponding path program 4 times [2023-09-01 01:57:53,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:57:53,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263077892] [2023-09-01 01:57:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:57:53,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:57:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:57:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:53,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:57:53,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263077892] [2023-09-01 01:57:53,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263077892] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:57:53,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408941342] [2023-09-01 01:57:53,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:57:53,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:57:53,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:57:53,725 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) [2023-09-01 01:57:53,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 01:57:53,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:57:53,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:57:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:57:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:57:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:57:54,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:57:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:57:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408941342] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:57:54,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:57:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-09-01 01:57:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968998266] [2023-09-01 01:57:54,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:57:54,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 01:57:54,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:57:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 01:57:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:57:56,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 01:57:56,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 661 transitions, 12803 flow. Second operand has 17 states, 17 states have (on average 105.52941176470588) internal successors, (1794), 17 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) [2023-09-01 01:57:56,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:57:56,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 01:57:56,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:57:59,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:04,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:07,022 INFO L130 PetriNetUnfolder]: 4155/7549 cut-off events. [2023-09-01 01:58:07,022 INFO L131 PetriNetUnfolder]: For 100191/100191 co-relation queries the response was YES. [2023-09-01 01:58:07,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55348 conditions, 7549 events. 4155/7549 cut-off events. For 100191/100191 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56489 event pairs, 382 based on Foata normal form. 14/7563 useless extension candidates. Maximal degree in co-relation 55287. Up to 5575 conditions per place. [2023-09-01 01:58:07,084 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 774 selfloop transitions, 235 changer transitions 29/1038 dead transitions. [2023-09-01 01:58:07,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 1038 transitions, 20728 flow [2023-09-01 01:58:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 01:58:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 01:58:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2358 transitions. [2023-09-01 01:58:07,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2023-09-01 01:58:07,088 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2358 transitions. [2023-09-01 01:58:07,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2358 transitions. [2023-09-01 01:58:07,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:07,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2358 transitions. [2023-09-01 01:58:07,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 112.28571428571429) internal successors, (2358), 21 states have internal predecessors, (2358), 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) [2023-09-01 01:58:07,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 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) [2023-09-01 01:58:07,099 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 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) [2023-09-01 01:58:07,099 INFO L175 Difference]: Start difference. First operand has 157 places, 661 transitions, 12803 flow. Second operand 21 states and 2358 transitions. [2023-09-01 01:58:07,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 1038 transitions, 20728 flow [2023-09-01 01:58:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1038 transitions, 18937 flow, removed 889 selfloop flow, removed 4 redundant places. [2023-09-01 01:58:08,077 INFO L231 Difference]: Finished difference. Result has 184 places, 823 transitions, 15597 flow [2023-09-01 01:58:08,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=11594, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15597, PETRI_PLACES=184, PETRI_TRANSITIONS=823} [2023-09-01 01:58:08,078 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 156 predicate places. [2023-09-01 01:58:08,078 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 823 transitions, 15597 flow [2023-09-01 01:58:08,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.52941176470588) internal successors, (1794), 17 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) [2023-09-01 01:58:08,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:08,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:08,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:58:08,283 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,SelfDestructingSolverStorable16 [2023-09-01 01:58:08,284 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)] === [2023-09-01 01:58:08,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:08,285 INFO L85 PathProgramCache]: Analyzing trace with hash -606026843, now seen corresponding path program 5 times [2023-09-01 01:58:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:08,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178422165] [2023-09-01 01:58:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:08,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:08,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178422165] [2023-09-01 01:58:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178422165] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:08,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248863322] [2023-09-01 01:58:08,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:58:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:08,375 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) [2023-09-01 01:58:08,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 01:58:08,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 01:58:08,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:58:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:08,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248863322] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:08,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:08,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 01:58:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308103837] [2023-09-01 01:58:08,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:08,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:58:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:58:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:58:08,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:58:08,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 823 transitions, 15597 flow. Second operand has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 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) [2023-09-01 01:58:08,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:08,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:58:08,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:11,038 INFO L130 PetriNetUnfolder]: 4987/8938 cut-off events. [2023-09-01 01:58:11,038 INFO L131 PetriNetUnfolder]: For 123092/123092 co-relation queries the response was YES. [2023-09-01 01:58:11,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66255 conditions, 8938 events. 4987/8938 cut-off events. For 123092/123092 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 67600 event pairs, 392 based on Foata normal form. 152/9090 useless extension candidates. Maximal degree in co-relation 66183. Up to 3535 conditions per place. [2023-09-01 01:58:11,131 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 640 selfloop transitions, 621 changer transitions 0/1261 dead transitions. [2023-09-01 01:58:11,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 1261 transitions, 25355 flow [2023-09-01 01:58:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 01:58:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 01:58:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1608 transitions. [2023-09-01 01:58:11,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2023-09-01 01:58:11,138 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1608 transitions. [2023-09-01 01:58:11,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1608 transitions. [2023-09-01 01:58:11,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:11,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1608 transitions. [2023-09-01 01:58:11,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 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) [2023-09-01 01:58:11,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 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) [2023-09-01 01:58:11,147 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 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) [2023-09-01 01:58:11,147 INFO L175 Difference]: Start difference. First operand has 184 places, 823 transitions, 15597 flow. Second operand 14 states and 1608 transitions. [2023-09-01 01:58:11,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 1261 transitions, 25355 flow [2023-09-01 01:58:12,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1261 transitions, 24814 flow, removed 262 selfloop flow, removed 5 redundant places. [2023-09-01 01:58:12,313 INFO L231 Difference]: Finished difference. Result has 200 places, 1006 transitions, 21638 flow [2023-09-01 01:58:12,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=15185, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21638, PETRI_PLACES=200, PETRI_TRANSITIONS=1006} [2023-09-01 01:58:12,314 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 172 predicate places. [2023-09-01 01:58:12,314 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 1006 transitions, 21638 flow [2023-09-01 01:58:12,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 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) [2023-09-01 01:58:12,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:12,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:12,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:58:12,515 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,SelfDestructingSolverStorable17 [2023-09-01 01:58:12,516 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)] === [2023-09-01 01:58:12,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2109694988, now seen corresponding path program 6 times [2023-09-01 01:58:12,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:12,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5375543] [2023-09-01 01:58:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:12,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5375543] [2023-09-01 01:58:12,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5375543] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831623742] [2023-09-01 01:58:12,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:58:12,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:12,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:12,983 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) [2023-09-01 01:58:13,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 01:58:13,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 01:58:13,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:13,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:58:13,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:13,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:58:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831623742] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:14,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:14,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-09-01 01:58:14,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136040345] [2023-09-01 01:58:14,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:14,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 01:58:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 01:58:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:58:14,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 01:58:14,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 1006 transitions, 21638 flow. Second operand has 17 states, 17 states have (on average 105.52941176470588) internal successors, (1794), 17 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) [2023-09-01 01:58:14,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:14,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 01:58:14,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:19,458 INFO L130 PetriNetUnfolder]: 5767/10353 cut-off events. [2023-09-01 01:58:19,458 INFO L131 PetriNetUnfolder]: For 194177/194177 co-relation queries the response was YES. [2023-09-01 01:58:19,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85708 conditions, 10353 events. 5767/10353 cut-off events. For 194177/194177 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 80622 event pairs, 420 based on Foata normal form. 16/10369 useless extension candidates. Maximal degree in co-relation 85628. Up to 5331 conditions per place. [2023-09-01 01:58:19,545 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 488 selfloop transitions, 809 changer transitions 15/1312 dead transitions. [2023-09-01 01:58:19,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1312 transitions, 30064 flow [2023-09-01 01:58:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 01:58:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 01:58:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2208 transitions. [2023-09-01 01:58:19,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2023-09-01 01:58:19,554 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2208 transitions. [2023-09-01 01:58:19,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2208 transitions. [2023-09-01 01:58:19,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:19,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2208 transitions. [2023-09-01 01:58:19,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.4) internal successors, (2208), 20 states have internal predecessors, (2208), 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) [2023-09-01 01:58:19,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 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) [2023-09-01 01:58:19,572 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 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) [2023-09-01 01:58:19,572 INFO L175 Difference]: Start difference. First operand has 200 places, 1006 transitions, 21638 flow. Second operand 20 states and 2208 transitions. [2023-09-01 01:58:19,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1312 transitions, 30064 flow [2023-09-01 01:58:21,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1312 transitions, 29827 flow, removed 111 selfloop flow, removed 2 redundant places. [2023-09-01 01:58:21,317 INFO L231 Difference]: Finished difference. Result has 226 places, 1205 transitions, 29565 flow [2023-09-01 01:58:21,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=21439, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=29565, PETRI_PLACES=226, PETRI_TRANSITIONS=1205} [2023-09-01 01:58:21,318 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 198 predicate places. [2023-09-01 01:58:21,318 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 1205 transitions, 29565 flow [2023-09-01 01:58:21,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.52941176470588) internal successors, (1794), 17 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) [2023-09-01 01:58:21,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:21,319 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:21,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:58:21,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:21,524 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)] === [2023-09-01 01:58:21,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1647556379, now seen corresponding path program 7 times [2023-09-01 01:58:21,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:21,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85360473] [2023-09-01 01:58:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:58:21,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:21,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85360473] [2023-09-01 01:58:21,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85360473] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:21,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601341898] [2023-09-01 01:58:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:58:21,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:21,587 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) [2023-09-01 01:58:21,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 01:58:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:21,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:58:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:21,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:58:21,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601341898] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:21,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:21,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-09-01 01:58:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271472586] [2023-09-01 01:58:21,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:58:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:58:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:58:21,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:58:21,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 1205 transitions, 29565 flow. Second operand has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 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) [2023-09-01 01:58:21,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:21,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:58:21,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:25,946 INFO L130 PetriNetUnfolder]: 6200/11058 cut-off events. [2023-09-01 01:58:25,947 INFO L131 PetriNetUnfolder]: For 248463/248463 co-relation queries the response was YES. [2023-09-01 01:58:26,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98951 conditions, 11058 events. 6200/11058 cut-off events. For 248463/248463 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 87221 event pairs, 74 based on Foata normal form. 104/11162 useless extension candidates. Maximal degree in co-relation 98862. Up to 2950 conditions per place. [2023-09-01 01:58:26,045 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1143 selfloop transitions, 570 changer transitions 0/1713 dead transitions. [2023-09-01 01:58:26,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1713 transitions, 40954 flow [2023-09-01 01:58:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:58:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:58:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1716 transitions. [2023-09-01 01:58:26,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434108527131783 [2023-09-01 01:58:26,048 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1716 transitions. [2023-09-01 01:58:26,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1716 transitions. [2023-09-01 01:58:26,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:26,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1716 transitions. [2023-09-01 01:58:26,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 114.4) internal successors, (1716), 15 states have internal predecessors, (1716), 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) [2023-09-01 01:58:26,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 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) [2023-09-01 01:58:26,057 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 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) [2023-09-01 01:58:26,057 INFO L175 Difference]: Start difference. First operand has 226 places, 1205 transitions, 29565 flow. Second operand 15 states and 1716 transitions. [2023-09-01 01:58:26,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1713 transitions, 40954 flow [2023-09-01 01:58:28,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1713 transitions, 39715 flow, removed 609 selfloop flow, removed 6 redundant places. [2023-09-01 01:58:28,621 INFO L231 Difference]: Finished difference. Result has 236 places, 1292 transitions, 32451 flow [2023-09-01 01:58:28,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=28193, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=32451, PETRI_PLACES=236, PETRI_TRANSITIONS=1292} [2023-09-01 01:58:28,622 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 208 predicate places. [2023-09-01 01:58:28,623 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 1292 transitions, 32451 flow [2023-09-01 01:58:28,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 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) [2023-09-01 01:58:28,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:28,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:28,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:58:28,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:28,824 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)] === [2023-09-01 01:58:28,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1115834550, now seen corresponding path program 8 times [2023-09-01 01:58:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:28,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772180521] [2023-09-01 01:58:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:29,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:29,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772180521] [2023-09-01 01:58:29,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772180521] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:29,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138817780] [2023-09-01 01:58:29,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:58:29,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:29,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:29,225 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) [2023-09-01 01:58:29,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 01:58:29,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:58:29,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:29,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 01:58:29,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:29,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:58:30,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138817780] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:30,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:30,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-09-01 01:58:30,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746708820] [2023-09-01 01:58:30,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:30,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 01:58:30,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:30,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 01:58:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-09-01 01:58:31,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 01:58:31,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1292 transitions, 32451 flow. Second operand has 18 states, 18 states have (on average 105.38888888888889) internal successors, (1897), 18 states have internal predecessors, (1897), 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) [2023-09-01 01:58:31,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:31,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 01:58:31,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:58:35,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:37,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:46,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 01:58:51,868 INFO L130 PetriNetUnfolder]: 7344/13088 cut-off events. [2023-09-01 01:58:51,869 INFO L131 PetriNetUnfolder]: For 321078/321078 co-relation queries the response was YES. [2023-09-01 01:58:51,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122856 conditions, 13088 events. 7344/13088 cut-off events. For 321078/321078 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 105139 event pairs, 566 based on Foata normal form. 34/13122 useless extension candidates. Maximal degree in co-relation 122767. Up to 5997 conditions per place. [2023-09-01 01:58:51,982 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 573 selfloop transitions, 1178 changer transitions 21/1772 dead transitions. [2023-09-01 01:58:51,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1772 transitions, 47694 flow [2023-09-01 01:58:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 01:58:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 01:58:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2633 transitions. [2023-09-01 01:58:51,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252260981912145 [2023-09-01 01:58:51,986 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2633 transitions. [2023-09-01 01:58:51,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2633 transitions. [2023-09-01 01:58:51,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:58:51,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2633 transitions. [2023-09-01 01:58:51,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 109.70833333333333) internal successors, (2633), 24 states have internal predecessors, (2633), 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) [2023-09-01 01:58:51,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 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) [2023-09-01 01:58:51,998 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 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) [2023-09-01 01:58:51,999 INFO L175 Difference]: Start difference. First operand has 236 places, 1292 transitions, 32451 flow. Second operand 24 states and 2633 transitions. [2023-09-01 01:58:51,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1772 transitions, 47694 flow [2023-09-01 01:58:55,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1772 transitions, 47011 flow, removed 65 selfloop flow, removed 5 redundant places. [2023-09-01 01:58:55,335 INFO L231 Difference]: Finished difference. Result has 265 places, 1632 transitions, 46483 flow [2023-09-01 01:58:55,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=32024, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=46483, PETRI_PLACES=265, PETRI_TRANSITIONS=1632} [2023-09-01 01:58:55,337 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 237 predicate places. [2023-09-01 01:58:55,338 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 1632 transitions, 46483 flow [2023-09-01 01:58:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 105.38888888888889) internal successors, (1897), 18 states have internal predecessors, (1897), 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) [2023-09-01 01:58:55,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:58:55,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:58:55,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 01:58:55,543 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,SelfDestructingSolverStorable20 [2023-09-01 01:58:55,544 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)] === [2023-09-01 01:58:55,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:58:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1560712288, now seen corresponding path program 9 times [2023-09-01 01:58:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:58:55,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398407260] [2023-09-01 01:58:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:58:55,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:58:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:58:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:55,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:58:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398407260] [2023-09-01 01:58:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398407260] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:58:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673443646] [2023-09-01 01:58:55,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 01:58:55,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:58:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:58:55,981 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) [2023-09-01 01:58:56,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 01:58:56,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 01:58:56,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:58:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:58:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:58:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:56,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:58:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:58:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673443646] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:58:56,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:58:56,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-09-01 01:58:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225357906] [2023-09-01 01:58:56,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:58:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 01:58:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:58:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 01:58:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-09-01 01:58:57,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 01:58:57,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 1632 transitions, 46483 flow. Second operand has 19 states, 19 states have (on average 105.26315789473684) internal successors, (2000), 19 states have internal predecessors, (2000), 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) [2023-09-01 01:58:57,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:58:57,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 01:58:57,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:09,351 INFO L130 PetriNetUnfolder]: 10591/18733 cut-off events. [2023-09-01 01:59:09,351 INFO L131 PetriNetUnfolder]: For 552636/552636 co-relation queries the response was YES. [2023-09-01 01:59:09,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192579 conditions, 18733 events. 10591/18733 cut-off events. For 552636/552636 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 157117 event pairs, 809 based on Foata normal form. 43/18776 useless extension candidates. Maximal degree in co-relation 192482. Up to 6872 conditions per place. [2023-09-01 01:59:09,557 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 774 selfloop transitions, 1912 changer transitions 34/2720 dead transitions. [2023-09-01 01:59:09,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 2720 transitions, 83217 flow [2023-09-01 01:59:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 01:59:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 01:59:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3839 transitions. [2023-09-01 01:59:09,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251384274640089 [2023-09-01 01:59:09,566 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3839 transitions. [2023-09-01 01:59:09,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3839 transitions. [2023-09-01 01:59:09,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:09,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3839 transitions. [2023-09-01 01:59:09,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 109.68571428571428) internal successors, (3839), 35 states have internal predecessors, (3839), 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) [2023-09-01 01:59:09,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 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) [2023-09-01 01:59:09,582 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 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) [2023-09-01 01:59:09,583 INFO L175 Difference]: Start difference. First operand has 265 places, 1632 transitions, 46483 flow. Second operand 35 states and 3839 transitions. [2023-09-01 01:59:09,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 2720 transitions, 83217 flow [2023-09-01 01:59:15,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 2720 transitions, 80183 flow, removed 1441 selfloop flow, removed 4 redundant places. [2023-09-01 01:59:15,678 INFO L231 Difference]: Finished difference. Result has 311 places, 2467 transitions, 77934 flow [2023-09-01 01:59:15,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=44662, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=77934, PETRI_PLACES=311, PETRI_TRANSITIONS=2467} [2023-09-01 01:59:15,680 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 283 predicate places. [2023-09-01 01:59:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 2467 transitions, 77934 flow [2023-09-01 01:59:15,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.26315789473684) internal successors, (2000), 19 states have internal predecessors, (2000), 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) [2023-09-01 01:59:15,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:15,681 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:15,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:15,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 01:59:15,891 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)] === [2023-09-01 01:59:15,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -583609677, now seen corresponding path program 10 times [2023-09-01 01:59:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930871267] [2023-09-01 01:59:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:15,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:59:15,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:15,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930871267] [2023-09-01 01:59:15,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930871267] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:15,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645559008] [2023-09-01 01:59:15,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:59:15,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:15,953 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) [2023-09-01 01:59:15,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 01:59:16,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:59:16,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:16,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 01:59:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:59:16,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:59:16,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645559008] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:16,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:16,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 01:59:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740361168] [2023-09-01 01:59:16,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:16,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:59:16,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:59:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:59:16,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 258 [2023-09-01 01:59:16,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 2467 transitions, 77934 flow. Second operand has 8 states, 8 states have (on average 115.125) internal successors, (921), 8 states have internal predecessors, (921), 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) [2023-09-01 01:59:16,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:16,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 258 [2023-09-01 01:59:16,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:25,860 INFO L130 PetriNetUnfolder]: 8208/14661 cut-off events. [2023-09-01 01:59:25,860 INFO L131 PetriNetUnfolder]: For 540588/540588 co-relation queries the response was YES. [2023-09-01 01:59:25,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152234 conditions, 14661 events. 8208/14661 cut-off events. For 540588/540588 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 119793 event pairs, 618 based on Foata normal form. 956/15617 useless extension candidates. Maximal degree in co-relation 152122. Up to 9647 conditions per place. [2023-09-01 01:59:26,025 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 1578 selfloop transitions, 460 changer transitions 3/2041 dead transitions. [2023-09-01 01:59:26,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 2041 transitions, 67304 flow [2023-09-01 01:59:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:59:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:59:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-09-01 01:59:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465891472868217 [2023-09-01 01:59:26,031 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-09-01 01:59:26,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-09-01 01:59:26,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:26,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-09-01 01:59:26,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 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) [2023-09-01 01:59:26,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:59:26,039 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-09-01 01:59:26,039 INFO L175 Difference]: Start difference. First operand has 311 places, 2467 transitions, 77934 flow. Second operand 5 states and 601 transitions. [2023-09-01 01:59:26,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 2041 transitions, 67304 flow [2023-09-01 01:59:30,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 2041 transitions, 62425 flow, removed 1799 selfloop flow, removed 16 redundant places. [2023-09-01 01:59:30,543 INFO L231 Difference]: Finished difference. Result has 296 places, 1875 transitions, 56119 flow [2023-09-01 01:59:30,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=51626, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=56119, PETRI_PLACES=296, PETRI_TRANSITIONS=1875} [2023-09-01 01:59:30,545 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 268 predicate places. [2023-09-01 01:59:30,545 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 1875 transitions, 56119 flow [2023-09-01 01:59:30,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.125) internal successors, (921), 8 states have internal predecessors, (921), 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) [2023-09-01 01:59:30,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:30,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:30,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 01:59:30,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:30,747 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)] === [2023-09-01 01:59:30,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash -270961632, now seen corresponding path program 11 times [2023-09-01 01:59:30,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:30,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765051964] [2023-09-01 01:59:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:30,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:59:30,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765051964] [2023-09-01 01:59:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765051964] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319738548] [2023-09-01 01:59:30,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:59:30,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:30,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:30,821 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) [2023-09-01 01:59:30,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 01:59:30,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 01:59:30,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:30,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:59:30,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:59:30,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:59:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319738548] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:31,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 01:59:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676181445] [2023-09-01 01:59:31,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:31,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:59:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:59:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:59:31,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:59:31,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1875 transitions, 56119 flow. Second operand has 10 states, 10 states have (on average 111.4) internal successors, (1114), 10 states have internal predecessors, (1114), 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) [2023-09-01 01:59:31,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:31,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:59:31,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:39,307 INFO L130 PetriNetUnfolder]: 8444/15117 cut-off events. [2023-09-01 01:59:39,307 INFO L131 PetriNetUnfolder]: For 480153/480153 co-relation queries the response was YES. [2023-09-01 01:59:39,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152605 conditions, 15117 events. 8444/15117 cut-off events. For 480153/480153 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 123949 event pairs, 932 based on Foata normal form. 180/15297 useless extension candidates. Maximal degree in co-relation 152498. Up to 14013 conditions per place. [2023-09-01 01:59:39,490 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1887 selfloop transitions, 152 changer transitions 0/2039 dead transitions. [2023-09-01 01:59:39,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 2039 transitions, 63509 flow [2023-09-01 01:59:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 01:59:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 01:59:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1509 transitions. [2023-09-01 01:59:39,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44991055456171736 [2023-09-01 01:59:39,492 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1509 transitions. [2023-09-01 01:59:39,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1509 transitions. [2023-09-01 01:59:39,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:39,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1509 transitions. [2023-09-01 01:59:39,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 116.07692307692308) internal successors, (1509), 13 states have internal predecessors, (1509), 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) [2023-09-01 01:59:39,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 258.0) internal successors, (3612), 14 states have internal predecessors, (3612), 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) [2023-09-01 01:59:39,498 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 258.0) internal successors, (3612), 14 states have internal predecessors, (3612), 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) [2023-09-01 01:59:39,499 INFO L175 Difference]: Start difference. First operand has 296 places, 1875 transitions, 56119 flow. Second operand 13 states and 1509 transitions. [2023-09-01 01:59:39,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 2039 transitions, 63509 flow [2023-09-01 01:59:43,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 2039 transitions, 63357 flow, removed 76 selfloop flow, removed 0 redundant places. [2023-09-01 01:59:43,855 INFO L231 Difference]: Finished difference. Result has 315 places, 1943 transitions, 58552 flow [2023-09-01 01:59:43,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=55718, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=58552, PETRI_PLACES=315, PETRI_TRANSITIONS=1943} [2023-09-01 01:59:43,857 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 287 predicate places. [2023-09-01 01:59:43,858 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1943 transitions, 58552 flow [2023-09-01 01:59:43,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.4) internal successors, (1114), 10 states have internal predecessors, (1114), 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) [2023-09-01 01:59:43,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:43,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:43,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:44,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:44,064 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)] === [2023-09-01 01:59:44,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -461296608, now seen corresponding path program 12 times [2023-09-01 01:59:44,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:44,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735054346] [2023-09-01 01:59:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:44,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:59:44,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:44,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735054346] [2023-09-01 01:59:44,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735054346] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:44,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325341162] [2023-09-01 01:59:44,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 01:59:44,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:44,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:44,126 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) [2023-09-01 01:59:44,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 01:59:44,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 01:59:44,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:59:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:59:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:59:44,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:59:44,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325341162] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:44,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:44,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-09-01 01:59:44,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288084218] [2023-09-01 01:59:44,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:59:44,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:59:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:59:44,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:59:44,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1943 transitions, 58552 flow. Second operand has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 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) [2023-09-01 01:59:44,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:44,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:59:44,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:59:52,839 INFO L130 PetriNetUnfolder]: 8412/15027 cut-off events. [2023-09-01 01:59:52,839 INFO L131 PetriNetUnfolder]: For 538350/538350 co-relation queries the response was YES. [2023-09-01 01:59:53,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159040 conditions, 15027 events. 8412/15027 cut-off events. For 538350/538350 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 123297 event pairs, 408 based on Foata normal form. 16/15043 useless extension candidates. Maximal degree in co-relation 158925. Up to 10049 conditions per place. [2023-09-01 01:59:53,099 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1844 selfloop transitions, 210 changer transitions 0/2054 dead transitions. [2023-09-01 01:59:53,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2054 transitions, 64422 flow [2023-09-01 01:59:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:59:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:59:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1712 transitions. [2023-09-01 01:59:53,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44237726098191216 [2023-09-01 01:59:53,101 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1712 transitions. [2023-09-01 01:59:53,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1712 transitions. [2023-09-01 01:59:53,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:59:53,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1712 transitions. [2023-09-01 01:59:53,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 114.13333333333334) internal successors, (1712), 15 states have internal predecessors, (1712), 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) [2023-09-01 01:59:53,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 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) [2023-09-01 01:59:53,105 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 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) [2023-09-01 01:59:53,105 INFO L175 Difference]: Start difference. First operand has 315 places, 1943 transitions, 58552 flow. Second operand 15 states and 1712 transitions. [2023-09-01 01:59:53,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2054 transitions, 64422 flow [2023-09-01 01:59:57,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2054 transitions, 63531 flow, removed 379 selfloop flow, removed 6 redundant places. [2023-09-01 01:59:58,013 INFO L231 Difference]: Finished difference. Result has 325 places, 1951 transitions, 58163 flow [2023-09-01 01:59:58,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=57058, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=58163, PETRI_PLACES=325, PETRI_TRANSITIONS=1951} [2023-09-01 01:59:58,014 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 297 predicate places. [2023-09-01 01:59:58,014 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1951 transitions, 58163 flow [2023-09-01 01:59:58,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.22222222222223) internal successors, (1001), 9 states have internal predecessors, (1001), 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) [2023-09-01 01:59:58,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:59:58,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:59:58,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 01:59:58,215 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,SelfDestructingSolverStorable24 [2023-09-01 01:59:58,216 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)] === [2023-09-01 01:59:58,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:59:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1566824238, now seen corresponding path program 13 times [2023-09-01 01:59:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:59:58,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838747661] [2023-09-01 01:59:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:59:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:59:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:59:58,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:59:58,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838747661] [2023-09-01 01:59:58,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838747661] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:59:58,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120211088] [2023-09-01 01:59:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 01:59:58,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:59:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:59:58,287 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) [2023-09-01 01:59:58,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 01:59:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:59:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 01:59:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:59:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:59:58,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:59:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 01:59:58,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120211088] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:59:58,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:59:58,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 01:59:58,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112284408] [2023-09-01 01:59:58,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:59:58,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:59:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:59:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:59:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 01:59:58,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 01:59:58,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1951 transitions, 58163 flow. Second operand has 10 states, 10 states have (on average 110.9) internal successors, (1109), 10 states have internal predecessors, (1109), 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) [2023-09-01 01:59:58,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:59:58,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 01:59:58,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:08,307 INFO L130 PetriNetUnfolder]: 9409/16995 cut-off events. [2023-09-01 02:00:08,307 INFO L131 PetriNetUnfolder]: For 657744/657744 co-relation queries the response was YES. [2023-09-01 02:00:08,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179231 conditions, 16995 events. 9409/16995 cut-off events. For 657744/657744 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 143226 event pairs, 494 based on Foata normal form. 358/17353 useless extension candidates. Maximal degree in co-relation 179115. Up to 5945 conditions per place. [2023-09-01 02:00:08,581 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1593 selfloop transitions, 688 changer transitions 125/2406 dead transitions. [2023-09-01 02:00:08,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 2406 transitions, 70062 flow [2023-09-01 02:00:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:00:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:00:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1377 transitions. [2023-09-01 02:00:08,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2023-09-01 02:00:08,583 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1377 transitions. [2023-09-01 02:00:08,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1377 transitions. [2023-09-01 02:00:08,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:08,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1377 transitions. [2023-09-01 02:00:08,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.75) internal successors, (1377), 12 states have internal predecessors, (1377), 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) [2023-09-01 02:00:08,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 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) [2023-09-01 02:00:08,586 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 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) [2023-09-01 02:00:08,586 INFO L175 Difference]: Start difference. First operand has 325 places, 1951 transitions, 58163 flow. Second operand 12 states and 1377 transitions. [2023-09-01 02:00:08,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 2406 transitions, 70062 flow [2023-09-01 02:00:15,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 2406 transitions, 69518 flow, removed 237 selfloop flow, removed 4 redundant places. [2023-09-01 02:00:15,049 INFO L231 Difference]: Finished difference. Result has 338 places, 1887 transitions, 56371 flow [2023-09-01 02:00:15,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=50725, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=56371, PETRI_PLACES=338, PETRI_TRANSITIONS=1887} [2023-09-01 02:00:15,052 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 310 predicate places. [2023-09-01 02:00:15,052 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1887 transitions, 56371 flow [2023-09-01 02:00:15,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.9) internal successors, (1109), 10 states have internal predecessors, (1109), 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) [2023-09-01 02:00:15,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:15,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:15,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:15,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 02:00:15,258 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)] === [2023-09-01 02:00:15,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1234529484, now seen corresponding path program 14 times [2023-09-01 02:00:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:15,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250827414] [2023-09-01 02:00:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:15,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:15,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:15,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250827414] [2023-09-01 02:00:15,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250827414] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:15,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665983860] [2023-09-01 02:00:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:00:15,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:15,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:15,313 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) [2023-09-01 02:00:15,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 02:00:15,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:00:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 02:00:15,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:15,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:15,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665983860] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:15,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:15,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-09-01 02:00:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460426732] [2023-09-01 02:00:15,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:15,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:00:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:00:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:00:15,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 02:00:15,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1887 transitions, 56371 flow. Second operand has 9 states, 9 states have (on average 111.33333333333333) internal successors, (1002), 9 states have internal predecessors, (1002), 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) [2023-09-01 02:00:15,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:15,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 02:00:15,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:24,399 INFO L130 PetriNetUnfolder]: 8767/15664 cut-off events. [2023-09-01 02:00:24,399 INFO L131 PetriNetUnfolder]: For 703361/703361 co-relation queries the response was YES. [2023-09-01 02:00:24,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174541 conditions, 15664 events. 8767/15664 cut-off events. For 703361/703361 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 127886 event pairs, 586 based on Foata normal form. 634/16298 useless extension candidates. Maximal degree in co-relation 174420. Up to 8042 conditions per place. [2023-09-01 02:00:24,606 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 1358 selfloop transitions, 840 changer transitions 0/2198 dead transitions. [2023-09-01 02:00:24,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 2198 transitions, 67929 flow [2023-09-01 02:00:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:00:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:00:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1275 transitions. [2023-09-01 02:00:24,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492600422832981 [2023-09-01 02:00:24,608 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1275 transitions. [2023-09-01 02:00:24,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1275 transitions. [2023-09-01 02:00:24,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:24,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1275 transitions. [2023-09-01 02:00:24,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.9090909090909) internal successors, (1275), 11 states have internal predecessors, (1275), 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) [2023-09-01 02:00:24,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 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) [2023-09-01 02:00:24,611 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 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) [2023-09-01 02:00:24,611 INFO L175 Difference]: Start difference. First operand has 338 places, 1887 transitions, 56371 flow. Second operand 11 states and 1275 transitions. [2023-09-01 02:00:24,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 2198 transitions, 67929 flow [2023-09-01 02:00:31,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 2198 transitions, 65738 flow, removed 952 selfloop flow, removed 6 redundant places. [2023-09-01 02:00:31,520 INFO L231 Difference]: Finished difference. Result has 346 places, 1967 transitions, 59863 flow [2023-09-01 02:00:31,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=53736, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=740, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=59863, PETRI_PLACES=346, PETRI_TRANSITIONS=1967} [2023-09-01 02:00:31,522 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 318 predicate places. [2023-09-01 02:00:31,522 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1967 transitions, 59863 flow [2023-09-01 02:00:31,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.33333333333333) internal successors, (1002), 9 states have internal predecessors, (1002), 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) [2023-09-01 02:00:31,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:31,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:31,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 02:00:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 02:00:31,723 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)] === [2023-09-01 02:00:31,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1497712035, now seen corresponding path program 15 times [2023-09-01 02:00:31,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:31,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364970977] [2023-09-01 02:00:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:31,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:31,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364970977] [2023-09-01 02:00:31,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364970977] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:00:31,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:00:31,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:00:31,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397957075] [2023-09-01 02:00:31,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:00:31,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:00:31,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:00:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:00:31,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 258 [2023-09-01 02:00:31,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1967 transitions, 59863 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 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) [2023-09-01 02:00:31,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:31,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 258 [2023-09-01 02:00:31,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:38,421 INFO L130 PetriNetUnfolder]: 5668/10453 cut-off events. [2023-09-01 02:00:38,421 INFO L131 PetriNetUnfolder]: For 410437/410437 co-relation queries the response was YES. [2023-09-01 02:00:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115911 conditions, 10453 events. 5668/10453 cut-off events. For 410437/410437 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 83189 event pairs, 1369 based on Foata normal form. 472/10925 useless extension candidates. Maximal degree in co-relation 115788. Up to 6062 conditions per place. [2023-09-01 02:00:38,537 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 1080 selfloop transitions, 239 changer transitions 305/1624 dead transitions. [2023-09-01 02:00:38,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1624 transitions, 52989 flow [2023-09-01 02:00:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:00:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:00:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-09-01 02:00:38,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46608527131782945 [2023-09-01 02:00:38,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-09-01 02:00:38,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-09-01 02:00:38,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:38,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-09-01 02:00:38,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 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) [2023-09-01 02:00:38,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 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) [2023-09-01 02:00:38,540 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 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) [2023-09-01 02:00:38,540 INFO L175 Difference]: Start difference. First operand has 346 places, 1967 transitions, 59863 flow. Second operand 4 states and 481 transitions. [2023-09-01 02:00:38,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1624 transitions, 52989 flow [2023-09-01 02:00:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1624 transitions, 51191 flow, removed 792 selfloop flow, removed 13 redundant places. [2023-09-01 02:00:42,111 INFO L231 Difference]: Finished difference. Result has 335 places, 1222 transitions, 35789 flow [2023-09-01 02:00:42,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=42614, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=35789, PETRI_PLACES=335, PETRI_TRANSITIONS=1222} [2023-09-01 02:00:42,113 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 307 predicate places. [2023-09-01 02:00:42,113 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1222 transitions, 35789 flow [2023-09-01 02:00:42,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 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) [2023-09-01 02:00:42,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:42,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:42,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 02:00:42,118 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)] === [2023-09-01 02:00:42,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash -692783648, now seen corresponding path program 4 times [2023-09-01 02:00:42,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:42,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70630286] [2023-09-01 02:00:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:42,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70630286] [2023-09-01 02:00:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70630286] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317374109] [2023-09-01 02:00:42,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:00:42,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:42,202 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) [2023-09-01 02:00:42,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 02:00:42,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:00:42,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 02:00:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:42,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:42,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317374109] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:42,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:42,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2023-09-01 02:00:42,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134844699] [2023-09-01 02:00:42,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:42,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:00:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:00:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:00:42,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 02:00:42,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1222 transitions, 35789 flow. Second operand has 12 states, 12 states have (on average 110.66666666666667) internal successors, (1328), 12 states have internal predecessors, (1328), 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) [2023-09-01 02:00:42,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:42,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 02:00:42,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:00:48,675 INFO L130 PetriNetUnfolder]: 6863/12520 cut-off events. [2023-09-01 02:00:48,675 INFO L131 PetriNetUnfolder]: For 529957/529957 co-relation queries the response was YES. [2023-09-01 02:00:48,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138985 conditions, 12520 events. 6863/12520 cut-off events. For 529957/529957 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 98738 event pairs, 570 based on Foata normal form. 172/12692 useless extension candidates. Maximal degree in co-relation 138869. Up to 3237 conditions per place. [2023-09-01 02:00:48,820 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 944 selfloop transitions, 1097 changer transitions 0/2041 dead transitions. [2023-09-01 02:00:48,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 2041 transitions, 62561 flow [2023-09-01 02:00:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 02:00:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 02:00:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2645 transitions. [2023-09-01 02:00:48,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2023-09-01 02:00:48,823 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2645 transitions. [2023-09-01 02:00:48,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2645 transitions. [2023-09-01 02:00:48,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:00:48,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2645 transitions. [2023-09-01 02:00:48,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 115.0) internal successors, (2645), 23 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) [2023-09-01 02:00:48,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 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) [2023-09-01 02:00:48,828 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 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) [2023-09-01 02:00:48,828 INFO L175 Difference]: Start difference. First operand has 335 places, 1222 transitions, 35789 flow. Second operand 23 states and 2645 transitions. [2023-09-01 02:00:48,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 2041 transitions, 62561 flow [2023-09-01 02:00:52,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 2041 transitions, 61073 flow, removed 413 selfloop flow, removed 6 redundant places. [2023-09-01 02:00:52,827 INFO L231 Difference]: Finished difference. Result has 358 places, 1691 transitions, 54748 flow [2023-09-01 02:00:52,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=35013, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=54748, PETRI_PLACES=358, PETRI_TRANSITIONS=1691} [2023-09-01 02:00:52,828 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 330 predicate places. [2023-09-01 02:00:52,828 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1691 transitions, 54748 flow [2023-09-01 02:00:52,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.66666666666667) internal successors, (1328), 12 states have internal predecessors, (1328), 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) [2023-09-01 02:00:52,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:00:52,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:00:52,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 02:00:53,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 02:00:53,031 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)] === [2023-09-01 02:00:53,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:00:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash 820308504, now seen corresponding path program 5 times [2023-09-01 02:00:53,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:00:53,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845882829] [2023-09-01 02:00:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:00:53,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:00:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:00:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:53,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:00:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845882829] [2023-09-01 02:00:53,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845882829] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:00:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811193160] [2023-09-01 02:00:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:00:53,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:00:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:00:53,100 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) [2023-09-01 02:00:53,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 02:00:53,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 02:00:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:00:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 02:00:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:00:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:00:53,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:00:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:00:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811193160] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:00:53,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:00:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2023-09-01 02:00:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333733263] [2023-09-01 02:00:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:00:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 02:00:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:00:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 02:00:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 02:00:53,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2023-09-01 02:00:53,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1691 transitions, 54748 flow. Second operand has 12 states, 12 states have (on average 110.75) internal successors, (1329), 12 states have internal predecessors, (1329), 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) [2023-09-01 02:00:53,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:00:53,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2023-09-01 02:00:53,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:00,615 INFO L130 PetriNetUnfolder]: 6644/12170 cut-off events. [2023-09-01 02:01:00,616 INFO L131 PetriNetUnfolder]: For 568291/568291 co-relation queries the response was YES. [2023-09-01 02:01:00,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140412 conditions, 12170 events. 6644/12170 cut-off events. For 568291/568291 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 96531 event pairs, 142 based on Foata normal form. 112/12282 useless extension candidates. Maximal degree in co-relation 140288. Up to 2745 conditions per place. [2023-09-01 02:01:00,767 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1229 selfloop transitions, 907 changer transitions 0/2136 dead transitions. [2023-09-01 02:01:00,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 2136 transitions, 66539 flow [2023-09-01 02:01:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 02:01:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 02:01:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2854 transitions. [2023-09-01 02:01:00,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44248062015503875 [2023-09-01 02:01:00,771 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2854 transitions. [2023-09-01 02:01:00,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2854 transitions. [2023-09-01 02:01:00,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:00,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2854 transitions. [2023-09-01 02:01:00,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 114.16) internal successors, (2854), 25 states have internal predecessors, (2854), 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) [2023-09-01 02:01:00,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 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) [2023-09-01 02:01:00,781 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 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) [2023-09-01 02:01:00,781 INFO L175 Difference]: Start difference. First operand has 358 places, 1691 transitions, 54748 flow. Second operand 25 states and 2854 transitions. [2023-09-01 02:01:00,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 2136 transitions, 66539 flow [2023-09-01 02:01:05,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 2136 transitions, 65334 flow, removed 551 selfloop flow, removed 4 redundant places. [2023-09-01 02:01:05,552 INFO L231 Difference]: Finished difference. Result has 382 places, 1703 transitions, 56528 flow [2023-09-01 02:01:05,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=52716, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=876, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=56528, PETRI_PLACES=382, PETRI_TRANSITIONS=1703} [2023-09-01 02:01:05,554 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 354 predicate places. [2023-09-01 02:01:05,554 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1703 transitions, 56528 flow [2023-09-01 02:01:05,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.75) internal successors, (1329), 12 states have internal predecessors, (1329), 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) [2023-09-01 02:01:05,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:05,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:05,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 02:01:05,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:05,755 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)] === [2023-09-01 02:01:05,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 513313272, now seen corresponding path program 16 times [2023-09-01 02:01:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:05,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70486243] [2023-09-01 02:01:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:05,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:06,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:06,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70486243] [2023-09-01 02:01:06,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70486243] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841458538] [2023-09-01 02:01:06,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:01:06,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:06,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:06,214 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) [2023-09-01 02:01:06,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 02:01:06,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:01:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:06,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 02:01:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:06,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:08,994 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))))) is different from false [2023-09-01 02:01:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-09-01 02:01:09,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841458538] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:09,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:09,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 02:01:09,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546423505] [2023-09-01 02:01:09,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:09,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 02:01:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:09,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 02:01:09,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=316, Unknown=1, NotChecked=36, Total=420 [2023-09-01 02:01:09,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-09-01 02:01:09,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1703 transitions, 56528 flow. Second operand has 21 states, 21 states have (on average 97.57142857142857) internal successors, (2049), 21 states have internal predecessors, (2049), 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) [2023-09-01 02:01:09,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:09,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-09-01 02:01:09,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:11,910 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1)) (.cse5 (* 4294967296 (div c_~k2~0 4294967296))) (.cse4 (+ c_~k2~0 (* 4294967296 (div c_~k1~0 4294967296))))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (< .cse4 (+ .cse5 c_~k1~0 1)) (<= (+ .cse5 c_~k1~0) .cse4))) is different from false [2023-09-01 02:01:14,920 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1))) (and (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-09-01 02:01:21,874 INFO L130 PetriNetUnfolder]: 7360/13545 cut-off events. [2023-09-01 02:01:21,874 INFO L131 PetriNetUnfolder]: For 680892/680892 co-relation queries the response was YES. [2023-09-01 02:01:21,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162970 conditions, 13545 events. 7360/13545 cut-off events. For 680892/680892 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 110175 event pairs, 594 based on Foata normal form. 18/13563 useless extension candidates. Maximal degree in co-relation 162841. Up to 12335 conditions per place. [2023-09-01 02:01:22,029 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 1828 selfloop transitions, 159 changer transitions 26/2013 dead transitions. [2023-09-01 02:01:22,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 2013 transitions, 69646 flow [2023-09-01 02:01:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 02:01:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 02:01:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1745 transitions. [2023-09-01 02:01:22,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39785681714546284 [2023-09-01 02:01:22,031 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1745 transitions. [2023-09-01 02:01:22,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1745 transitions. [2023-09-01 02:01:22,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:01:22,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1745 transitions. [2023-09-01 02:01:22,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 102.6470588235294) internal successors, (1745), 17 states have internal predecessors, (1745), 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) [2023-09-01 02:01:22,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 258.0) internal successors, (4644), 18 states have internal predecessors, (4644), 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) [2023-09-01 02:01:22,036 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 258.0) internal successors, (4644), 18 states have internal predecessors, (4644), 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) [2023-09-01 02:01:22,036 INFO L175 Difference]: Start difference. First operand has 382 places, 1703 transitions, 56528 flow. Second operand 17 states and 1745 transitions. [2023-09-01 02:01:22,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 2013 transitions, 69646 flow [2023-09-01 02:01:28,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 2013 transitions, 68062 flow, removed 588 selfloop flow, removed 7 redundant places. [2023-09-01 02:01:28,755 INFO L231 Difference]: Finished difference. Result has 400 places, 1840 transitions, 60320 flow [2023-09-01 02:01:28,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=55032, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=60320, PETRI_PLACES=400, PETRI_TRANSITIONS=1840} [2023-09-01 02:01:28,757 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 372 predicate places. [2023-09-01 02:01:28,757 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1840 transitions, 60320 flow [2023-09-01 02:01:28,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.57142857142857) internal successors, (2049), 21 states have internal predecessors, (2049), 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) [2023-09-01 02:01:28,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:01:28,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:01:28,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 02:01:28,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:28,960 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)] === [2023-09-01 02:01:28,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:01:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1565600284, now seen corresponding path program 17 times [2023-09-01 02:01:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:01:28,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785969595] [2023-09-01 02:01:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:01:28,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:01:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:01:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:29,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:01:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785969595] [2023-09-01 02:01:29,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785969595] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:01:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190399273] [2023-09-01 02:01:29,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:01:29,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:01:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:01:29,333 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) [2023-09-01 02:01:29,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 02:01:29,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 02:01:29,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:01:29,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 02:01:29,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:01:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:01:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:01:30,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190399273] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:01:30,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:01:30,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-09-01 02:01:30,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583656765] [2023-09-01 02:01:30,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:01:30,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 02:01:30,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:01:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 02:01:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-09-01 02:01:32,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 02:01:32,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1840 transitions, 60320 flow. Second operand has 24 states, 24 states have (on average 105.125) internal successors, (2523), 24 states have internal predecessors, (2523), 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) [2023-09-01 02:01:32,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:01:32,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 02:01:32,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:01:45,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 02:01:48,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 02:01:51,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:01:58,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:00,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:02,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:04,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:06,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:02:14,534 INFO L130 PetriNetUnfolder]: 9235/17281 cut-off events. [2023-09-01 02:02:14,535 INFO L131 PetriNetUnfolder]: For 863041/863041 co-relation queries the response was YES. [2023-09-01 02:02:14,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212259 conditions, 17281 events. 9235/17281 cut-off events. For 863041/863041 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 148446 event pairs, 552 based on Foata normal form. 100/17381 useless extension candidates. Maximal degree in co-relation 212122. Up to 6139 conditions per place. [2023-09-01 02:02:14,740 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 948 selfloop transitions, 1614 changer transitions 199/2761 dead transitions. [2023-09-01 02:02:14,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2761 transitions, 92940 flow [2023-09-01 02:02:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 02:02:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 02:02:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4047 transitions. [2023-09-01 02:02:14,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239472030169705 [2023-09-01 02:02:14,749 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4047 transitions. [2023-09-01 02:02:14,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4047 transitions. [2023-09-01 02:02:14,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:14,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4047 transitions. [2023-09-01 02:02:14,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 109.37837837837837) internal successors, (4047), 37 states have internal predecessors, (4047), 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) [2023-09-01 02:02:14,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 258.0) internal successors, (9804), 38 states have internal predecessors, (9804), 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) [2023-09-01 02:02:14,766 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 258.0) internal successors, (9804), 38 states have internal predecessors, (9804), 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) [2023-09-01 02:02:14,766 INFO L175 Difference]: Start difference. First operand has 400 places, 1840 transitions, 60320 flow. Second operand 37 states and 4047 transitions. [2023-09-01 02:02:14,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2761 transitions, 92940 flow [2023-09-01 02:02:23,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 2761 transitions, 91966 flow, removed 479 selfloop flow, removed 4 redundant places. [2023-09-01 02:02:23,428 INFO L231 Difference]: Finished difference. Result has 445 places, 2340 transitions, 82769 flow [2023-09-01 02:02:23,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=59294, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=82769, PETRI_PLACES=445, PETRI_TRANSITIONS=2340} [2023-09-01 02:02:23,429 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 417 predicate places. [2023-09-01 02:02:23,429 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 2340 transitions, 82769 flow [2023-09-01 02:02:23,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 105.125) internal successors, (2523), 24 states have internal predecessors, (2523), 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) [2023-09-01 02:02:23,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:23,430 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:23,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:23,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:23,631 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)] === [2023-09-01 02:02:23,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1641298301, now seen corresponding path program 18 times [2023-09-01 02:02:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:23,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553352671] [2023-09-01 02:02:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:23,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:24,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553352671] [2023-09-01 02:02:24,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553352671] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:24,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922954862] [2023-09-01 02:02:24,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:02:24,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:24,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:24,093 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) [2023-09-01 02:02:24,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 02:02:24,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-09-01 02:02:24,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:02:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 02:02:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:26,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:02:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 02:02:28,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922954862] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:02:28,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:02:28,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 21 [2023-09-01 02:02:28,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371909685] [2023-09-01 02:02:28,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:02:28,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 02:02:28,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:02:28,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 02:02:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-09-01 02:02:29,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 02:02:29,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 2340 transitions, 82769 flow. Second operand has 23 states, 23 states have (on average 105.21739130434783) internal successors, (2420), 23 states have internal predecessors, (2420), 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) [2023-09-01 02:02:29,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:02:29,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 02:02:29,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:02:44,790 INFO L130 PetriNetUnfolder]: 9047/16806 cut-off events. [2023-09-01 02:02:44,790 INFO L131 PetriNetUnfolder]: For 874259/874259 co-relation queries the response was YES. [2023-09-01 02:02:44,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214010 conditions, 16806 events. 9047/16806 cut-off events. For 874259/874259 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 142326 event pairs, 768 based on Foata normal form. 6/16812 useless extension candidates. Maximal degree in co-relation 213860. Up to 16194 conditions per place. [2023-09-01 02:02:45,008 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 2308 selfloop transitions, 133 changer transitions 44/2485 dead transitions. [2023-09-01 02:02:45,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2485 transitions, 89823 flow [2023-09-01 02:02:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 02:02:45,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 02:02:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2411 transitions. [2023-09-01 02:02:45,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247709654686399 [2023-09-01 02:02:45,010 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2411 transitions. [2023-09-01 02:02:45,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2411 transitions. [2023-09-01 02:02:45,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:02:45,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2411 transitions. [2023-09-01 02:02:45,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.5909090909091) internal successors, (2411), 22 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) [2023-09-01 02:02:45,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 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) [2023-09-01 02:02:45,018 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 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) [2023-09-01 02:02:45,018 INFO L175 Difference]: Start difference. First operand has 445 places, 2340 transitions, 82769 flow. Second operand 22 states and 2411 transitions. [2023-09-01 02:02:45,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2485 transitions, 89823 flow [2023-09-01 02:02:54,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2485 transitions, 86557 flow, removed 1619 selfloop flow, removed 8 redundant places. [2023-09-01 02:02:54,722 INFO L231 Difference]: Finished difference. Result has 466 places, 2383 transitions, 81354 flow [2023-09-01 02:02:54,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=79537, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=81354, PETRI_PLACES=466, PETRI_TRANSITIONS=2383} [2023-09-01 02:02:54,724 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 438 predicate places. [2023-09-01 02:02:54,724 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 2383 transitions, 81354 flow [2023-09-01 02:02:54,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 105.21739130434783) internal successors, (2420), 23 states have internal predecessors, (2420), 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) [2023-09-01 02:02:54,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:02:54,725 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:02:54,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 02:02:54,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:54,925 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)] === [2023-09-01 02:02:54,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:02:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1743013771, now seen corresponding path program 19 times [2023-09-01 02:02:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:02:54,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143612181] [2023-09-01 02:02:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:02:54,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:02:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:55,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:02:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143612181] [2023-09-01 02:02:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143612181] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:02:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186823995] [2023-09-01 02:02:55,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 02:02:55,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:02:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:02:55,437 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) [2023-09-01 02:02:55,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 02:02:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:02:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 02:02:55,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:02:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:02:56,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:03:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:03:02,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186823995] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:03:02,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:03:02,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 24 [2023-09-01 02:03:02,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113498863] [2023-09-01 02:03:02,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:03:02,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 02:03:02,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:03:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 02:03:02,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=538, Unknown=2, NotChecked=0, Total=650 [2023-09-01 02:03:03,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-09-01 02:03:03,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 2383 transitions, 81354 flow. Second operand has 26 states, 26 states have (on average 97.0) internal successors, (2522), 26 states have internal predecessors, (2522), 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) [2023-09-01 02:03:03,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:03:03,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-09-01 02:03:03,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:03:07,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:03:13,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 02:03:33,194 INFO L130 PetriNetUnfolder]: 9762/17953 cut-off events. [2023-09-01 02:03:33,194 INFO L131 PetriNetUnfolder]: For 906352/906352 co-relation queries the response was YES. [2023-09-01 02:03:33,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225965 conditions, 17953 events. 9762/17953 cut-off events. For 906352/906352 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 151817 event pairs, 576 based on Foata normal form. 7/17960 useless extension candidates. Maximal degree in co-relation 225806. Up to 11121 conditions per place. [2023-09-01 02:03:33,468 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1159 selfloop transitions, 1584 changer transitions 52/2795 dead transitions. [2023-09-01 02:03:33,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2795 transitions, 98192 flow [2023-09-01 02:03:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 02:03:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 02:03:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3542 transitions. [2023-09-01 02:03:33,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922480620155039 [2023-09-01 02:03:33,471 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3542 transitions. [2023-09-01 02:03:33,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3542 transitions. [2023-09-01 02:03:33,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:03:33,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3542 transitions. [2023-09-01 02:03:33,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 101.2) internal successors, (3542), 35 states have internal predecessors, (3542), 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) [2023-09-01 02:03:33,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 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) [2023-09-01 02:03:33,481 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 258.0) internal successors, (9288), 36 states have internal predecessors, (9288), 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) [2023-09-01 02:03:33,481 INFO L175 Difference]: Start difference. First operand has 466 places, 2383 transitions, 81354 flow. Second operand 35 states and 3542 transitions. [2023-09-01 02:03:33,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2795 transitions, 98192 flow [2023-09-01 02:03:43,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 2795 transitions, 97804 flow, removed 147 selfloop flow, removed 11 redundant places. [2023-09-01 02:03:43,487 INFO L231 Difference]: Finished difference. Result has 497 places, 2616 transitions, 96089 flow [2023-09-01 02:03:43,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=81005, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=96089, PETRI_PLACES=497, PETRI_TRANSITIONS=2616} [2023-09-01 02:03:43,490 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 469 predicate places. [2023-09-01 02:03:43,490 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 2616 transitions, 96089 flow [2023-09-01 02:03:43,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 97.0) internal successors, (2522), 26 states have internal predecessors, (2522), 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) [2023-09-01 02:03:43,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:03:43,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:03:43,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 02:03:43,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:03:43,702 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)] === [2023-09-01 02:03:43,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:03:43,703 INFO L85 PathProgramCache]: Analyzing trace with hash -982478424, now seen corresponding path program 20 times [2023-09-01 02:03:43,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:03:43,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797706797] [2023-09-01 02:03:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:03:43,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:03:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:03:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:44,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:03:44,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797706797] [2023-09-01 02:03:44,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797706797] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:03:44,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359837348] [2023-09-01 02:03:44,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 02:03:44,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:03:44,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:03:44,041 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) [2023-09-01 02:03:44,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 02:03:44,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 02:03:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:03:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:03:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:03:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:03:44,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:03:47,238 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-09-01 02:03:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-09-01 02:03:47,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359837348] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:03:47,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:03:47,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 02:03:47,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864194795] [2023-09-01 02:03:47,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:03:47,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 02:03:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:03:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 02:03:47,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-09-01 02:03:47,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-09-01 02:03:47,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 2616 transitions, 96089 flow. Second operand has 21 states, 21 states have (on average 97.38095238095238) internal successors, (2045), 21 states have internal predecessors, (2045), 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) [2023-09-01 02:03:47,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:03:47,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-09-01 02:03:47,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:03:49,954 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-09-01 02:03:53,572 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-09-01 02:04:01,266 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-09-01 02:04:11,032 INFO L130 PetriNetUnfolder]: 10137/18696 cut-off events. [2023-09-01 02:04:11,032 INFO L131 PetriNetUnfolder]: For 1047355/1047355 co-relation queries the response was YES. [2023-09-01 02:04:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245721 conditions, 18696 events. 10137/18696 cut-off events. For 1047355/1047355 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 159726 event pairs, 851 based on Foata normal form. 9/18705 useless extension candidates. Maximal degree in co-relation 245555. Up to 17933 conditions per place. [2023-09-01 02:04:11,402 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 2696 selfloop transitions, 121 changer transitions 11/2828 dead transitions. [2023-09-01 02:04:11,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 2828 transitions, 108911 flow [2023-09-01 02:04:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 02:04:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 02:04:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1831 transitions. [2023-09-01 02:04:11,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39427217915590007 [2023-09-01 02:04:11,404 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1831 transitions. [2023-09-01 02:04:11,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1831 transitions. [2023-09-01 02:04:11,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:04:11,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1831 transitions. [2023-09-01 02:04:11,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.72222222222223) internal successors, (1831), 18 states have internal predecessors, (1831), 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) [2023-09-01 02:04:11,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 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) [2023-09-01 02:04:11,410 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 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) [2023-09-01 02:04:11,410 INFO L175 Difference]: Start difference. First operand has 497 places, 2616 transitions, 96089 flow. Second operand 18 states and 1831 transitions. [2023-09-01 02:04:11,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 2828 transitions, 108911 flow [2023-09-01 02:04:23,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 2828 transitions, 107532 flow, removed 671 selfloop flow, removed 10 redundant places. [2023-09-01 02:04:23,243 INFO L231 Difference]: Finished difference. Result has 513 places, 2704 transitions, 98847 flow [2023-09-01 02:04:23,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=94736, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=98847, PETRI_PLACES=513, PETRI_TRANSITIONS=2704} [2023-09-01 02:04:23,246 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 485 predicate places. [2023-09-01 02:04:23,247 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 2704 transitions, 98847 flow [2023-09-01 02:04:23,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.38095238095238) internal successors, (2045), 21 states have internal predecessors, (2045), 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) [2023-09-01 02:04:23,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:04:23,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:04:23,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 02:04:23,448 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,SelfDestructingSolverStorable34 [2023-09-01 02:04:23,448 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)] === [2023-09-01 02:04:23,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:04:23,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1651926386, now seen corresponding path program 21 times [2023-09-01 02:04:23,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:04:23,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246209828] [2023-09-01 02:04:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:04:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:04:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:04:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:04:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246209828] [2023-09-01 02:04:23,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246209828] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:04:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537001647] [2023-09-01 02:04:23,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 02:04:23,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:04:23,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:04:23,817 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) [2023-09-01 02:04:23,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 02:04:24,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 02:04:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:04:24,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:04:24,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:04:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:04:24,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:04:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:04:27,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537001647] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:04:27,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:04:27,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-09-01 02:04:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842608220] [2023-09-01 02:04:27,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:04:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 02:04:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:04:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 02:04:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=429, Unknown=1, NotChecked=0, Total=506 [2023-09-01 02:04:28,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 02:04:28,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 2704 transitions, 98847 flow. Second operand has 23 states, 23 states have (on average 105.26086956521739) internal successors, (2421), 23 states have internal predecessors, (2421), 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) [2023-09-01 02:04:28,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:04:28,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 02:04:28,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:04:45,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:04:54,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:04:57,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:01,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:07,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:17,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:20,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:29,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:36,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:49,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:51,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:05:55,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 02:06:01,803 INFO L130 PetriNetUnfolder]: 13612/25017 cut-off events. [2023-09-01 02:06:01,804 INFO L131 PetriNetUnfolder]: For 1536495/1536495 co-relation queries the response was YES. [2023-09-01 02:06:02,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353365 conditions, 25017 events. 13612/25017 cut-off events. For 1536495/1536495 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 222191 event pairs, 936 based on Foata normal form. 38/25055 useless extension candidates. Maximal degree in co-relation 353190. Up to 18664 conditions per place. [2023-09-01 02:06:02,422 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 3169 selfloop transitions, 832 changer transitions 53/4054 dead transitions. [2023-09-01 02:06:02,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 4054 transitions, 157411 flow [2023-09-01 02:06:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 02:06:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 02:06:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3948 transitions. [2023-09-01 02:06:02,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42506459948320413 [2023-09-01 02:06:02,429 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3948 transitions. [2023-09-01 02:06:02,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3948 transitions. [2023-09-01 02:06:02,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:06:02,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3948 transitions. [2023-09-01 02:06:02,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 109.66666666666667) internal successors, (3948), 36 states have internal predecessors, (3948), 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) [2023-09-01 02:06:02,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 258.0) internal successors, (9546), 37 states have internal predecessors, (9546), 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) [2023-09-01 02:06:02,440 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 258.0) internal successors, (9546), 37 states have internal predecessors, (9546), 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) [2023-09-01 02:06:02,441 INFO L175 Difference]: Start difference. First operand has 513 places, 2704 transitions, 98847 flow. Second operand 36 states and 3948 transitions. [2023-09-01 02:06:02,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 4054 transitions, 157411 flow [2023-09-01 02:06:21,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 4054 transitions, 155847 flow, removed 771 selfloop flow, removed 6 redundant places. [2023-09-01 02:06:21,803 INFO L231 Difference]: Finished difference. Result has 561 places, 3396 transitions, 131660 flow [2023-09-01 02:06:21,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=97937, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=131660, PETRI_PLACES=561, PETRI_TRANSITIONS=3396} [2023-09-01 02:06:21,805 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 533 predicate places. [2023-09-01 02:06:21,805 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 3396 transitions, 131660 flow [2023-09-01 02:06:21,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 105.26086956521739) internal successors, (2421), 23 states have internal predecessors, (2421), 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) [2023-09-01 02:06:21,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:06:21,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:06:21,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 02:06:22,006 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,SelfDestructingSolverStorable35 [2023-09-01 02:06:22,007 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)] === [2023-09-01 02:06:22,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:06:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1247984198, now seen corresponding path program 22 times [2023-09-01 02:06:22,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:06:22,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559907234] [2023-09-01 02:06:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:06:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:06:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:06:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:06:22,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:06:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559907234] [2023-09-01 02:06:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559907234] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:06:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731809840] [2023-09-01 02:06:22,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 02:06:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:06:22,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:06:22,381 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) [2023-09-01 02:06:22,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 02:06:22,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 02:06:22,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:06:22,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 02:06:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:06:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:06:23,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:06:25,639 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-09-01 02:06:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-09-01 02:06:25,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731809840] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:06:25,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:06:25,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 02:06:25,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508669259] [2023-09-01 02:06:25,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:06:25,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 02:06:25,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:06:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 02:06:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=320, Unknown=1, NotChecked=36, Total=420 [2023-09-01 02:06:25,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-09-01 02:06:25,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 3396 transitions, 131660 flow. Second operand has 21 states, 21 states have (on average 97.42857142857143) internal successors, (2046), 21 states have internal predecessors, (2046), 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) [2023-09-01 02:06:25,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:06:25,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-09-01 02:06:25,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:06:29,012 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse9 (* 4294967296 (div c_~k2~0 4294967296)))) (let ((.cse3 (* (div (+ c_~k1~0 1) 4294967296) 4294967296)) (.cse4 (< c_~j1~0 c_~m~0)) (.cse7 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse5 (+ c_~j1~0 1)) (.cse10 (+ .cse9 c_~k1~0)) (.cse12 (* 4294967296 (div c_~k1~0 4294967296)))) (and (<= (+ c_~k2~0 (* c_~j1~0 2)) (+ c_~m~0 (* 4294967296 (div (+ (- 2) c_~k2~0 c_~m~0) 4294967296)) (* (div (+ (- c_~k1~0) 1) 4294967296) 4294967296) c_~k1~0 1)) (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 .cse3)) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) .cse4) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse5 ~m~0) (let ((.cse6 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse6 .cse7))))) (or (let ((.cse8 (+ c_~k2~0 .cse3))) (and (<= .cse8 (+ .cse9 c_~k1~0 1)) (< .cse10 .cse8))) .cse4) (forall ((~m~0 Int)) (or (let ((.cse11 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse11 .cse7) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse11) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse5 ~m~0))) (<= (+ c_~k2~0 .cse12) .cse10) (< .cse10 (+ c_~k2~0 .cse12 1))))) is different from false [2023-09-01 02:06:35,532 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-09-01 02:06:48,710 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-09-01 02:07:09,783 INFO L130 PetriNetUnfolder]: 14103/25963 cut-off events. [2023-09-01 02:07:09,783 INFO L131 PetriNetUnfolder]: For 1680182/1680182 co-relation queries the response was YES. [2023-09-01 02:07:10,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375503 conditions, 25963 events. 14103/25963 cut-off events. For 1680182/1680182 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 232421 event pairs, 1122 based on Foata normal form. 9/25972 useless extension candidates. Maximal degree in co-relation 375308. Up to 25045 conditions per place. [2023-09-01 02:07:10,436 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 3501 selfloop transitions, 163 changer transitions 25/3689 dead transitions. [2023-09-01 02:07:10,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 3689 transitions, 148663 flow [2023-09-01 02:07:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 02:07:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 02:07:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2338 transitions. [2023-09-01 02:07:10,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39400067408156386 [2023-09-01 02:07:10,443 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2338 transitions. [2023-09-01 02:07:10,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2338 transitions. [2023-09-01 02:07:10,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:07:10,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2338 transitions. [2023-09-01 02:07:10,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 101.65217391304348) internal successors, (2338), 23 states have internal predecessors, (2338), 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) [2023-09-01 02:07:10,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 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) [2023-09-01 02:07:10,450 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 258.0) internal successors, (6192), 24 states have internal predecessors, (6192), 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) [2023-09-01 02:07:10,450 INFO L175 Difference]: Start difference. First operand has 561 places, 3396 transitions, 131660 flow. Second operand 23 states and 2338 transitions. [2023-09-01 02:07:10,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 3689 transitions, 148663 flow [2023-09-01 02:07:33,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 3689 transitions, 144838 flow, removed 1893 selfloop flow, removed 10 redundant places. [2023-09-01 02:07:33,495 INFO L231 Difference]: Finished difference. Result has 587 places, 3522 transitions, 133874 flow [2023-09-01 02:07:33,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=127891, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=133874, PETRI_PLACES=587, PETRI_TRANSITIONS=3522} [2023-09-01 02:07:33,498 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 559 predicate places. [2023-09-01 02:07:33,498 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 3522 transitions, 133874 flow [2023-09-01 02:07:33,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.42857142857143) internal successors, (2046), 21 states have internal predecessors, (2046), 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) [2023-09-01 02:07:33,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:07:33,499 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:07:33,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 02:07:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 02:07:33,700 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)] === [2023-09-01 02:07:33,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:07:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1145677113, now seen corresponding path program 23 times [2023-09-01 02:07:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:07:33,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723986070] [2023-09-01 02:07:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:07:33,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:07:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:07:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:07:34,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:07:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723986070] [2023-09-01 02:07:34,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723986070] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:07:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931759336] [2023-09-01 02:07:34,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 02:07:34,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:07:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:07:34,248 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) [2023-09-01 02:07:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 02:07:34,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 02:07:34,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:07:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 02:07:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:07:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:07:35,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:07:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 02:07:35,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931759336] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:07:35,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:07:35,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 24 [2023-09-01 02:07:35,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568420054] [2023-09-01 02:07:35,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:07:35,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 02:07:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:07:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 02:07:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-09-01 02:07:37,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 02:07:37,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 3522 transitions, 133874 flow. Second operand has 26 states, 26 states have (on average 105.0) internal successors, (2730), 26 states have internal predecessors, (2730), 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) [2023-09-01 02:07:37,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:07:37,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 02:07:37,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:08:25,964 INFO L130 PetriNetUnfolder]: 15317/28013 cut-off events. [2023-09-01 02:08:25,964 INFO L131 PetriNetUnfolder]: For 1872259/1872259 co-relation queries the response was YES. [2023-09-01 02:08:26,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415543 conditions, 28013 events. 15317/28013 cut-off events. For 1872259/1872259 co-relation queries the response was YES. Maximal size of possible extension queue 1545. Compared 251649 event pairs, 857 based on Foata normal form. 9/28022 useless extension candidates. Maximal degree in co-relation 415333. Up to 16902 conditions per place. [2023-09-01 02:08:26,702 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 1636 selfloop transitions, 2359 changer transitions 63/4058 dead transitions. [2023-09-01 02:08:26,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 4058 transitions, 159806 flow [2023-09-01 02:08:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 02:08:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 02:08:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4461 transitions. [2023-09-01 02:08:26,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421724333522405 [2023-09-01 02:08:26,706 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4461 transitions. [2023-09-01 02:08:26,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4461 transitions. [2023-09-01 02:08:26,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:08:26,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4461 transitions. [2023-09-01 02:08:26,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 108.8048780487805) internal successors, (4461), 41 states have internal predecessors, (4461), 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) [2023-09-01 02:08:26,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 258.0) internal successors, (10836), 42 states have internal predecessors, (10836), 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) [2023-09-01 02:08:26,716 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 258.0) internal successors, (10836), 42 states have internal predecessors, (10836), 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) [2023-09-01 02:08:26,717 INFO L175 Difference]: Start difference. First operand has 587 places, 3522 transitions, 133874 flow. Second operand 41 states and 4461 transitions. [2023-09-01 02:08:26,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 4058 transitions, 159806 flow [2023-09-01 02:08:54,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 4058 transitions, 158815 flow, removed 480 selfloop flow, removed 7 redundant places. [2023-09-01 02:08:54,804 INFO L231 Difference]: Finished difference. Result has 631 places, 3862 transitions, 156667 flow [2023-09-01 02:08:54,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=132883, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=156667, PETRI_PLACES=631, PETRI_TRANSITIONS=3862} [2023-09-01 02:08:54,808 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 603 predicate places. [2023-09-01 02:08:54,808 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 3862 transitions, 156667 flow [2023-09-01 02:08:54,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.0) internal successors, (2730), 26 states have internal predecessors, (2730), 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) [2023-09-01 02:08:54,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:08:54,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:08:54,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 02:08:55,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:08:55,015 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)] === [2023-09-01 02:08:55,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:08:55,015 INFO L85 PathProgramCache]: Analyzing trace with hash -770870210, now seen corresponding path program 24 times [2023-09-01 02:08:55,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:08:55,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789586737] [2023-09-01 02:08:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:08:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:08:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:08:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:08:55,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:08:55,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789586737] [2023-09-01 02:08:55,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789586737] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 02:08:55,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033103960] [2023-09-01 02:08:55,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 02:08:55,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 02:08:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:08:55,494 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) [2023-09-01 02:08:55,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 02:08:55,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 02:08:55,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 02:08:55,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 02:08:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 02:08:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:08:56,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 02:08:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:08:56,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033103960] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 02:08:56,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 02:08:56,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-09-01 02:08:56,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073310320] [2023-09-01 02:08:56,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 02:08:56,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 02:08:56,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:08:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 02:08:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-09-01 02:08:57,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2023-09-01 02:08:57,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 3862 transitions, 156667 flow. Second operand has 22 states, 22 states have (on average 105.45454545454545) internal successors, (2320), 22 states have internal predecessors, (2320), 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) [2023-09-01 02:08:57,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:08:57,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2023-09-01 02:08:57,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:09:09,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 02:09:23,074 WARN L222 SmtUtils]: Spent 12.11s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 02:10:08,455 INFO L130 PetriNetUnfolder]: 16701/30706 cut-off events. [2023-09-01 02:10:08,455 INFO L131 PetriNetUnfolder]: For 2280623/2280623 co-relation queries the response was YES. [2023-09-01 02:10:09,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474228 conditions, 30706 events. 16701/30706 cut-off events. For 2280623/2280623 co-relation queries the response was YES. Maximal size of possible extension queue 1648. Compared 279403 event pairs, 1004 based on Foata normal form. 22/30728 useless extension candidates. Maximal degree in co-relation 474007. Up to 19700 conditions per place. [2023-09-01 02:10:09,406 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 2042 selfloop transitions, 2425 changer transitions 45/4512 dead transitions. [2023-09-01 02:10:09,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 4512 transitions, 189675 flow [2023-09-01 02:10:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 02:10:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 02:10:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3507 transitions. [2023-09-01 02:10:09,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42478197674418605 [2023-09-01 02:10:09,410 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3507 transitions. [2023-09-01 02:10:09,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3507 transitions. [2023-09-01 02:10:09,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:10:09,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3507 transitions. [2023-09-01 02:10:09,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 109.59375) internal successors, (3507), 32 states have internal predecessors, (3507), 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) [2023-09-01 02:10:09,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 258.0) internal successors, (8514), 33 states have internal predecessors, (8514), 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) [2023-09-01 02:10:09,419 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 258.0) internal successors, (8514), 33 states have internal predecessors, (8514), 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) [2023-09-01 02:10:09,419 INFO L175 Difference]: Start difference. First operand has 631 places, 3862 transitions, 156667 flow. Second operand 32 states and 3507 transitions. [2023-09-01 02:10:09,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 4512 transitions, 189675 flow Killed by 15