./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:56:31,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:56:31,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:56:31,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:56:31,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:56:31,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:56:31,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:56:31,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:56:31,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:56:31,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:56:31,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:56:31,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:56:31,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:56:31,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:56:31,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:56:31,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:56:31,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:56:31,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:56:31,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:56:31,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:56:31,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:56:31,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:56:31,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:56:31,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:56:31,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:56:31,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:56:31,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:56:31,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:56:31,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:56:31,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:56:31,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:56:31,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:56:31,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:56:31,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:56:31,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:56:31,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:56:31,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:56:31,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:56:31,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:56:31,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:56:31,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:56:31,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:56:31,419 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:56:31,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:56:31,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:56:31,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:56:31,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:56:31,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:56:31,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:56:31,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:56:31,423 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:56:31,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:56:31,424 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:56:31,424 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:56:31,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:56:31,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:56:31,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:56:31,425 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:56:31,425 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:56:31,425 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:56:31,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:56:31,426 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:56:31,426 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:56:31,426 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:56:31,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:56:31,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:56:31,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:56:31,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:56:31,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:56:31,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:56:31,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:56:31,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:56:31,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:56:31,428 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:56:31,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:56:31,429 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:56:31,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:56:31,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:56:31,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:56:31,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:56:31,771 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:56:31,771 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:56:31,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-30 06:56:33,048 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:56:33,243 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:56:33,243 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-30 06:56:33,252 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d6dd97fa/5d424f95bcaa4071b47b4bac21ec18c0/FLAGb873918fa [2023-08-30 06:56:33,263 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d6dd97fa/5d424f95bcaa4071b47b4bac21ec18c0 [2023-08-30 06:56:33,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:56:33,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:56:33,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:56:33,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:56:33,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:56:33,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c364f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33, skipping insertion in model container [2023-08-30 06:56:33,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:56:33,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:56:33,440 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-30 06:56:33,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:56:33,453 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:56:33,478 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-30 06:56:33,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:56:33,486 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:56:33,486 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:56:33,492 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:56:33,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33 WrapperNode [2023-08-30 06:56:33,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:56:33,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:56:33,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:56:33,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:56:33,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,544 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-08-30 06:56:33,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:56:33,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:56:33,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:56:33,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:56:33,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,584 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:56:33,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:56:33,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:56:33,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:56:33,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (1/1) ... [2023-08-30 06:56:33,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:56:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:33,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:56:33,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:56:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:56:33,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:56:33,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 06:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 06:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:56:33,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:56:33,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 06:56:33,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:56:33,682 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:56:33,785 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:56:33,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:56:34,062 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:56:34,097 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:56:34,097 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 06:56:34,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:56:34 BoogieIcfgContainer [2023-08-30 06:56:34,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:56:34,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:56:34,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:56:34,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:56:34,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:56:33" (1/3) ... [2023-08-30 06:56:34,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4be795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:56:34, skipping insertion in model container [2023-08-30 06:56:34,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:56:33" (2/3) ... [2023-08-30 06:56:34,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4be795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:56:34, skipping insertion in model container [2023-08-30 06:56:34,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:56:34" (3/3) ... [2023-08-30 06:56:34,115 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-30 06:56:34,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:56:34,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 06:56:34,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:56:34,241 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 06:56:34,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 198 flow [2023-08-30 06:56:34,352 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2023-08-30 06:56:34,353 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:56:34,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 06:56:34,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 198 flow [2023-08-30 06:56:34,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 182 flow [2023-08-30 06:56:34,377 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:56:34,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-30 06:56:34,394 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-30 06:56:34,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 182 flow [2023-08-30 06:56:34,429 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 06:56:34,429 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:56:34,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 06:56:34,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-30 06:56:37,047 INFO L134 LiptonReduction]: Checked pairs total: 665 [2023-08-30 06:56:37,048 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-30 06:56:37,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:56:37,062 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;@1460dcde, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:56:37,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 06:56:37,064 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 06:56:37,064 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:56:37,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:37,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 06:56:37,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:37,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash 355, now seen corresponding path program 1 times [2023-08-30 06:56:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:37,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175800533] [2023-08-30 06:56:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:37,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:37,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175800533] [2023-08-30 06:56:37,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175800533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:37,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:37,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 06:56:37,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721657597] [2023-08-30 06:56:37,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:37,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 06:56:37,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:37,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 06:56:37,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 06:56:37,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 06:56:37,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:37,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 06:56:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:37,320 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 06:56:37,320 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 06:56:37,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 509 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 06:56:37,324 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 06:56:37,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 06:56:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 06:56:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 06:56:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2023-08-30 06:56:37,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317919075144508 [2023-08-30 06:56:37,339 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2023-08-30 06:56:37,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2023-08-30 06:56:37,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:37,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2023-08-30 06:56:37,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,356 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,358 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 184 transitions. [2023-08-30 06:56:37,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 06:56:37,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:56:37,362 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 06:56:37,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 06:56:37,367 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 06:56:37,367 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 06:56:37,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:37,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:56:37,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 06:56:37,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:37,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 347876, now seen corresponding path program 1 times [2023-08-30 06:56:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765055745] [2023-08-30 06:56:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:37,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:37,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:37,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765055745] [2023-08-30 06:56:37,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765055745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:37,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:37,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:56:37,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422446804] [2023-08-30 06:56:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:56:37,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:56:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:56:37,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 173 [2023-08-30 06:56:37,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:37,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 173 [2023-08-30 06:56:37,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:37,721 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 06:56:37,722 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:56:37,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 461 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 06:56:37,723 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 06:56:37,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 06:56:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:56:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:56:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-30 06:56:37,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47591522157996147 [2023-08-30 06:56:37,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-30 06:56:37,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-30 06:56:37,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:37,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-30 06:56:37,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,730 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 247 transitions. [2023-08-30 06:56:37,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 06:56:37,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 06:56:37,731 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 06:56:37,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 06:56:37,732 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 06:56:37,732 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 06:56:37,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:37,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:56:37,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 06:56:37,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:37,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash 347875, now seen corresponding path program 1 times [2023-08-30 06:56:37,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:37,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831476523] [2023-08-30 06:56:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:37,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831476523] [2023-08-30 06:56:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831476523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:37,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:37,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:56:37,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504824062] [2023-08-30 06:56:37,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:37,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:56:37,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:37,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:56:37,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:56:37,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-30 06:56:37,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:37,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-30 06:56:37,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:37,891 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 06:56:37,891 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:56:37,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 406 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 06:56:37,893 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 06:56:37,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 06:56:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:56:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:56:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-30 06:56:37,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489402697495183 [2023-08-30 06:56:37,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-30 06:56:37,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-30 06:56:37,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:37,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-30 06:56:37,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,905 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 233 transitions. [2023-08-30 06:56:37,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 06:56:37,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:56:37,906 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 06:56:37,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-30 06:56:37,907 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 06:56:37,907 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 06:56:37,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:37,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:37,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:56:37,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 06:56:37,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:37,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash 334314637, now seen corresponding path program 1 times [2023-08-30 06:56:37,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:37,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97961305] [2023-08-30 06:56:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:37,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:37,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97961305] [2023-08-30 06:56:37,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97961305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:37,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:37,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:56:37,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994180272] [2023-08-30 06:56:37,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:37,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:56:37,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:37,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:56:37,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:56:38,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 173 [2023-08-30 06:56:38,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:38,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 173 [2023-08-30 06:56:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:38,081 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 06:56:38,081 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:56:38,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 281 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 06:56:38,082 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 06:56:38,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 06:56:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:56:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:56:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-30 06:56:38,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42196531791907516 [2023-08-30 06:56:38,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-30 06:56:38,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-30 06:56:38,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:38,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-30 06:56:38,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,087 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 219 transitions. [2023-08-30 06:56:38,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 06:56:38,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:56:38,088 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 06:56:38,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-30 06:56:38,089 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 06:56:38,090 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 06:56:38,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:38,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:56:38,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 06:56:38,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:38,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:38,091 INFO L85 PathProgramCache]: Analyzing trace with hash 334314636, now seen corresponding path program 1 times [2023-08-30 06:56:38,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:38,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130478843] [2023-08-30 06:56:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:38,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130478843] [2023-08-30 06:56:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130478843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:38,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:56:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076450828] [2023-08-30 06:56:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:56:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:56:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:56:38,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 173 [2023-08-30 06:56:38,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:38,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 173 [2023-08-30 06:56:38,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:38,301 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 06:56:38,302 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:56:38,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 06:56:38,303 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 06:56:38,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 06:56:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:56:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:56:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-30 06:56:38,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45472061657032753 [2023-08-30 06:56:38,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-30 06:56:38,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-30 06:56:38,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:38,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-30 06:56:38,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,309 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 236 transitions. [2023-08-30 06:56:38,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 06:56:38,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:56:38,310 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 06:56:38,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 06:56:38,312 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 06:56:38,313 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 06:56:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:38,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:38,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 06:56:38,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:38,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash 502104479, now seen corresponding path program 1 times [2023-08-30 06:56:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:38,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208772006] [2023-08-30 06:56:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:38,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:38,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208772006] [2023-08-30 06:56:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208772006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:38,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:38,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:56:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344753403] [2023-08-30 06:56:38,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:56:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:56:38,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:56:38,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-08-30 06:56:38,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:38,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-08-30 06:56:38,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:38,534 INFO L130 PetriNetUnfolder]: 63/112 cut-off events. [2023-08-30 06:56:38,534 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 06:56:38,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 112 events. 63/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 332 event pairs, 13 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 230. Up to 66 conditions per place. [2023-08-30 06:56:38,535 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 17 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-08-30 06:56:38,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-08-30 06:56:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:56:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:56:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-08-30 06:56:38,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028901734104047 [2023-08-30 06:56:38,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-08-30 06:56:38,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-08-30 06:56:38,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:38,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-08-30 06:56:38,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,540 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 261 transitions. [2023-08-30 06:56:38,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-08-30 06:56:38,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:56:38,542 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 50 flow [2023-08-30 06:56:38,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-30 06:56:38,544 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-08-30 06:56:38,545 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 50 flow [2023-08-30 06:56:38,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:38,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:38,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 06:56:38,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:38,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1548984245, now seen corresponding path program 1 times [2023-08-30 06:56:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:38,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357703601] [2023-08-30 06:56:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:38,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:38,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357703601] [2023-08-30 06:56:38,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357703601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:38,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:56:38,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:56:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412584194] [2023-08-30 06:56:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:56:38,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:56:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:56:38,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 173 [2023-08-30 06:56:38,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:38,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 173 [2023-08-30 06:56:38,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:38,757 INFO L130 PetriNetUnfolder]: 102/196 cut-off events. [2023-08-30 06:56:38,757 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-30 06:56:38,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 196 events. 102/196 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 646 event pairs, 46 based on Foata normal form. 6/174 useless extension candidates. Maximal degree in co-relation 435. Up to 125 conditions per place. [2023-08-30 06:56:38,760 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2023-08-30 06:56:38,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 37 transitions, 178 flow [2023-08-30 06:56:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:56:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:56:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 402 transitions. [2023-08-30 06:56:38,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647398843930636 [2023-08-30 06:56:38,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 402 transitions. [2023-08-30 06:56:38,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 402 transitions. [2023-08-30 06:56:38,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:38,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 402 transitions. [2023-08-30 06:56:38,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.4) internal successors, (402), 5 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,765 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,765 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 50 flow. Second operand 5 states and 402 transitions. [2023-08-30 06:56:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 37 transitions, 178 flow [2023-08-30 06:56:38,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:56:38,767 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 74 flow [2023-08-30 06:56:38,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-08-30 06:56:38,768 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-30 06:56:38,768 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 74 flow [2023-08-30 06:56:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:38,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:38,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:38,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 06:56:38,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:38,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash 244022087, now seen corresponding path program 2 times [2023-08-30 06:56:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312361952] [2023-08-30 06:56:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312361952] [2023-08-30 06:56:38,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312361952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:38,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196796571] [2023-08-30 06:56:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:56:38,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:38,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:38,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 06:56:38,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:56:38,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:38,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:56:38,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:56:39,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:56:39,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196796571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:56:39,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 06:56:39,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-08-30 06:56:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908266472] [2023-08-30 06:56:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:56:39,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:56:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:56:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:56:39,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 173 [2023-08-30 06:56:39,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:39,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:39,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 173 [2023-08-30 06:56:39,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:39,181 INFO L130 PetriNetUnfolder]: 73/134 cut-off events. [2023-08-30 06:56:39,182 INFO L131 PetriNetUnfolder]: For 131/140 co-relation queries the response was YES. [2023-08-30 06:56:39,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 134 events. 73/134 cut-off events. For 131/140 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 386 event pairs, 37 based on Foata normal form. 12/134 useless extension candidates. Maximal degree in co-relation 389. Up to 105 conditions per place. [2023-08-30 06:56:39,183 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-30 06:56:39,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 23 transitions, 135 flow [2023-08-30 06:56:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:56:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:56:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 321 transitions. [2023-08-30 06:56:39,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638728323699422 [2023-08-30 06:56:39,185 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 321 transitions. [2023-08-30 06:56:39,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 321 transitions. [2023-08-30 06:56:39,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:39,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 321 transitions. [2023-08-30 06:56:39,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:39,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:39,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:39,190 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 74 flow. Second operand 4 states and 321 transitions. [2023-08-30 06:56:39,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 23 transitions, 135 flow [2023-08-30 06:56:39,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 117 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 06:56:39,193 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 62 flow [2023-08-30 06:56:39,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-08-30 06:56:39,195 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-30 06:56:39,195 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 62 flow [2023-08-30 06:56:39,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:39,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:39,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:39,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 06:56:39,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:39,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:39,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 558410263, now seen corresponding path program 1 times [2023-08-30 06:56:39,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:39,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589422004] [2023-08-30 06:56:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:39,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:39,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:39,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589422004] [2023-08-30 06:56:39,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589422004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:39,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930668506] [2023-08-30 06:56:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:39,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:39,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:39,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:39,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 06:56:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:56:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:39,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930668506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:40,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:40,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 2] total 9 [2023-08-30 06:56:40,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926469461] [2023-08-30 06:56:40,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 06:56:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 06:56:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-30 06:56:40,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 173 [2023-08-30 06:56:40,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 62 flow. Second operand has 11 states, 11 states have (on average 72.45454545454545) internal successors, (797), 11 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:40,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:40,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 173 [2023-08-30 06:56:40,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:40,455 INFO L130 PetriNetUnfolder]: 187/339 cut-off events. [2023-08-30 06:56:40,455 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-08-30 06:56:40,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 339 events. 187/339 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1290 event pairs, 15 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 889. Up to 109 conditions per place. [2023-08-30 06:56:40,459 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 53 selfloop transitions, 23 changer transitions 21/97 dead transitions. [2023-08-30 06:56:40,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 97 transitions, 499 flow [2023-08-30 06:56:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:56:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:56:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 994 transitions. [2023-08-30 06:56:40,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44197421076033794 [2023-08-30 06:56:40,463 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 994 transitions. [2023-08-30 06:56:40,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 994 transitions. [2023-08-30 06:56:40,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:40,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 994 transitions. [2023-08-30 06:56:40,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.46153846153847) internal successors, (994), 13 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:40,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 173.0) internal successors, (2422), 14 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:40,470 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 173.0) internal successors, (2422), 14 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:40,470 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 62 flow. Second operand 13 states and 994 transitions. [2023-08-30 06:56:40,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 97 transitions, 499 flow [2023-08-30 06:56:40,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 06:56:40,475 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 216 flow [2023-08-30 06:56:40,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=216, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-30 06:56:40,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-08-30 06:56:40,477 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 216 flow [2023-08-30 06:56:40,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 72.45454545454545) internal successors, (797), 11 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:40,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:40,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:40,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:40,683 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,SelfDestructingSolverStorable8 [2023-08-30 06:56:40,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:40,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2108995189, now seen corresponding path program 2 times [2023-08-30 06:56:40,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:40,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173044550] [2023-08-30 06:56:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:56:40,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173044550] [2023-08-30 06:56:40,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173044550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580657191] [2023-08-30 06:56:40,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:56:40,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:40,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:40,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 06:56:40,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:56:40,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 06:56:40,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:56:40,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:56:41,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580657191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:41,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:41,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 06:56:41,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795739380] [2023-08-30 06:56:41,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:41,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:56:41,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:56:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:56:41,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 173 [2023-08-30 06:56:41,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 75.9) internal successors, (759), 10 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:41,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:41,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 173 [2023-08-30 06:56:41,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:41,321 INFO L130 PetriNetUnfolder]: 184/346 cut-off events. [2023-08-30 06:56:41,321 INFO L131 PetriNetUnfolder]: For 506/507 co-relation queries the response was YES. [2023-08-30 06:56:41,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 346 events. 184/346 cut-off events. For 506/507 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1319 event pairs, 41 based on Foata normal form. 21/367 useless extension candidates. Maximal degree in co-relation 1137. Up to 199 conditions per place. [2023-08-30 06:56:41,324 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 43 selfloop transitions, 16 changer transitions 6/67 dead transitions. [2023-08-30 06:56:41,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 470 flow [2023-08-30 06:56:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:56:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:56:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 481 transitions. [2023-08-30 06:56:41,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633911368015414 [2023-08-30 06:56:41,326 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 481 transitions. [2023-08-30 06:56:41,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 481 transitions. [2023-08-30 06:56:41,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:41,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 481 transitions. [2023-08-30 06:56:41,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 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) [2023-08-30 06:56:41,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:41,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:41,329 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 216 flow. Second operand 6 states and 481 transitions. [2023-08-30 06:56:41,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 470 flow [2023-08-30 06:56:41,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 445 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 06:56:41,334 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 309 flow [2023-08-30 06:56:41,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-30 06:56:41,335 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2023-08-30 06:56:41,335 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 309 flow [2023-08-30 06:56:41,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 75.9) internal successors, (759), 10 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:41,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:41,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:41,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:41,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:41,543 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:41,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:41,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2113833375, now seen corresponding path program 3 times [2023-08-30 06:56:41,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:41,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561633132] [2023-08-30 06:56:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561633132] [2023-08-30 06:56:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561633132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:41,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121133386] [2023-08-30 06:56:41,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:56:41,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:41,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:41,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 06:56:41,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:56:41,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:56:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:41,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:42,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121133386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:42,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:42,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-08-30 06:56:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950553893] [2023-08-30 06:56:42,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:42,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:56:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:56:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:56:42,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-30 06:56:42,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 309 flow. Second operand has 12 states, 12 states have (on average 74.58333333333333) internal successors, (895), 12 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:42,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:42,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-30 06:56:42,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:42,535 INFO L130 PetriNetUnfolder]: 223/415 cut-off events. [2023-08-30 06:56:42,535 INFO L131 PetriNetUnfolder]: For 965/965 co-relation queries the response was YES. [2023-08-30 06:56:42,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 415 events. 223/415 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1674 event pairs, 41 based on Foata normal form. 6/421 useless extension candidates. Maximal degree in co-relation 1554. Up to 187 conditions per place. [2023-08-30 06:56:42,539 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 58 selfloop transitions, 19 changer transitions 20/97 dead transitions. [2023-08-30 06:56:42,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 731 flow [2023-08-30 06:56:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:56:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:56:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 866 transitions. [2023-08-30 06:56:42,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550709406200736 [2023-08-30 06:56:42,542 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 866 transitions. [2023-08-30 06:56:42,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 866 transitions. [2023-08-30 06:56:42,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:42,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 866 transitions. [2023-08-30 06:56:42,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.72727272727273) internal successors, (866), 11 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:42,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:42,548 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:42,548 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 309 flow. Second operand 11 states and 866 transitions. [2023-08-30 06:56:42,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 731 flow [2023-08-30 06:56:42,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 97 transitions, 700 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-30 06:56:42,555 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 392 flow [2023-08-30 06:56:42,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=392, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-30 06:56:42,555 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2023-08-30 06:56:42,556 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 392 flow [2023-08-30 06:56:42,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.58333333333333) internal successors, (895), 12 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:42,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:42,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:42,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:42,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:42,765 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:42,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1578008217, now seen corresponding path program 4 times [2023-08-30 06:56:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607533541] [2023-08-30 06:56:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:42,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607533541] [2023-08-30 06:56:42,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607533541] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399031283] [2023-08-30 06:56:42,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:56:42,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:42,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:42,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 06:56:43,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:56:43,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:43,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:56:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:43,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:43,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399031283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:43,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:43,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 06:56:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656958401] [2023-08-30 06:56:43,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:43,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:56:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:56:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:56:43,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 173 [2023-08-30 06:56:43,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 392 flow. Second operand has 16 states, 16 states have (on average 72.375) internal successors, (1158), 16 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:43,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:43,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 173 [2023-08-30 06:56:43,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:44,154 INFO L130 PetriNetUnfolder]: 378/701 cut-off events. [2023-08-30 06:56:44,154 INFO L131 PetriNetUnfolder]: For 3199/3199 co-relation queries the response was YES. [2023-08-30 06:56:44,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3102 conditions, 701 events. 378/701 cut-off events. For 3199/3199 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3255 event pairs, 65 based on Foata normal form. 38/739 useless extension candidates. Maximal degree in co-relation 3081. Up to 249 conditions per place. [2023-08-30 06:56:44,161 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 98 selfloop transitions, 48 changer transitions 7/153 dead transitions. [2023-08-30 06:56:44,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 153 transitions, 1277 flow [2023-08-30 06:56:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:56:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:56:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1454 transitions. [2023-08-30 06:56:44,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423486461819288 [2023-08-30 06:56:44,166 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1454 transitions. [2023-08-30 06:56:44,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1454 transitions. [2023-08-30 06:56:44,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:44,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1454 transitions. [2023-08-30 06:56:44,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 76.52631578947368) internal successors, (1454), 19 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:44,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 173.0) internal successors, (3460), 20 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:44,175 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 173.0) internal successors, (3460), 20 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:44,176 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 392 flow. Second operand 19 states and 1454 transitions. [2023-08-30 06:56:44,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 153 transitions, 1277 flow [2023-08-30 06:56:44,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 153 transitions, 1155 flow, removed 53 selfloop flow, removed 5 redundant places. [2023-08-30 06:56:44,191 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 818 flow [2023-08-30 06:56:44,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=818, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2023-08-30 06:56:44,192 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-08-30 06:56:44,193 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 818 flow [2023-08-30 06:56:44,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 72.375) internal successors, (1158), 16 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:44,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:44,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:44,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:44,399 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,SelfDestructingSolverStorable11 [2023-08-30 06:56:44,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:44,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash -62934905, now seen corresponding path program 5 times [2023-08-30 06:56:44,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:44,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331280384] [2023-08-30 06:56:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:44,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331280384] [2023-08-30 06:56:44,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331280384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871416288] [2023-08-30 06:56:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:56:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:44,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:44,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 06:56:44,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:56:44,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:56:44,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:44,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871416288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:45,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:45,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2023-08-30 06:56:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19105773] [2023-08-30 06:56:45,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:45,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 06:56:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 06:56:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-30 06:56:45,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-30 06:56:45,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 818 flow. Second operand has 15 states, 15 states have (on average 74.33333333333333) internal successors, (1115), 15 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:45,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:45,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-30 06:56:45,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:46,170 INFO L130 PetriNetUnfolder]: 600/1140 cut-off events. [2023-08-30 06:56:46,171 INFO L131 PetriNetUnfolder]: For 11124/11124 co-relation queries the response was YES. [2023-08-30 06:56:46,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 1140 events. 600/1140 cut-off events. For 11124/11124 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6273 event pairs, 11 based on Foata normal form. 24/1164 useless extension candidates. Maximal degree in co-relation 6170. Up to 393 conditions per place. [2023-08-30 06:56:46,183 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 108 selfloop transitions, 88 changer transitions 41/237 dead transitions. [2023-08-30 06:56:46,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 237 transitions, 2354 flow [2023-08-30 06:56:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 06:56:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 06:56:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1962 transitions. [2023-08-30 06:56:46,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536416184971098 [2023-08-30 06:56:46,189 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1962 transitions. [2023-08-30 06:56:46,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1962 transitions. [2023-08-30 06:56:46,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:46,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1962 transitions. [2023-08-30 06:56:46,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 78.48) internal successors, (1962), 25 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:46,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 173.0) internal successors, (4498), 26 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:46,203 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 173.0) internal successors, (4498), 26 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:46,203 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 818 flow. Second operand 25 states and 1962 transitions. [2023-08-30 06:56:46,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 237 transitions, 2354 flow [2023-08-30 06:56:46,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 237 transitions, 2136 flow, removed 97 selfloop flow, removed 4 redundant places. [2023-08-30 06:56:46,235 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1458 flow [2023-08-30 06:56:46,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1458, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2023-08-30 06:56:46,237 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2023-08-30 06:56:46,237 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1458 flow [2023-08-30 06:56:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.33333333333333) internal successors, (1115), 15 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:46,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:46,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:46,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:46,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:46,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:46,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:46,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1171108499, now seen corresponding path program 6 times [2023-08-30 06:56:46,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:46,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186424568] [2023-08-30 06:56:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:46,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:46,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:46,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186424568] [2023-08-30 06:56:46,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186424568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:46,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111118084] [2023-08-30 06:56:46,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:56:46,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:46,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:46,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 06:56:46,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 06:56:46,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:56:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:46,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:47,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111118084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:47,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:47,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-08-30 06:56:47,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358627739] [2023-08-30 06:56:47,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:47,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:56:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:56:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:56:47,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-30 06:56:47,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1458 flow. Second operand has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:47,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:47,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-30 06:56:47,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:47,693 INFO L130 PetriNetUnfolder]: 611/1164 cut-off events. [2023-08-30 06:56:47,693 INFO L131 PetriNetUnfolder]: For 20005/20005 co-relation queries the response was YES. [2023-08-30 06:56:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7989 conditions, 1164 events. 611/1164 cut-off events. For 20005/20005 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6371 event pairs, 39 based on Foata normal form. 20/1184 useless extension candidates. Maximal degree in co-relation 7947. Up to 373 conditions per place. [2023-08-30 06:56:47,709 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 121 selfloop transitions, 93 changer transitions 17/231 dead transitions. [2023-08-30 06:56:47,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 231 transitions, 3130 flow [2023-08-30 06:56:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 06:56:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 06:56:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1395 transitions. [2023-08-30 06:56:47,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479768786127168 [2023-08-30 06:56:47,713 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1395 transitions. [2023-08-30 06:56:47,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1395 transitions. [2023-08-30 06:56:47,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:47,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1395 transitions. [2023-08-30 06:56:47,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 77.5) internal successors, (1395), 18 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:47,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 173.0) internal successors, (3287), 19 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:47,722 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 173.0) internal successors, (3287), 19 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:47,722 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1458 flow. Second operand 18 states and 1395 transitions. [2023-08-30 06:56:47,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 231 transitions, 3130 flow [2023-08-30 06:56:47,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 231 transitions, 2746 flow, removed 154 selfloop flow, removed 8 redundant places. [2023-08-30 06:56:47,777 INFO L231 Difference]: Finished difference. Result has 130 places, 170 transitions, 2112 flow [2023-08-30 06:56:47,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2112, PETRI_PLACES=130, PETRI_TRANSITIONS=170} [2023-08-30 06:56:47,778 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2023-08-30 06:56:47,778 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 170 transitions, 2112 flow [2023-08-30 06:56:47,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:47,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:47,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:47,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:47,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:47,985 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:47,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1998234997, now seen corresponding path program 7 times [2023-08-30 06:56:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23087193] [2023-08-30 06:56:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:48,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23087193] [2023-08-30 06:56:48,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23087193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130670935] [2023-08-30 06:56:48,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:56:48,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:48,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:48,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:48,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 06:56:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:56:48,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:48,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:48,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130670935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:48,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:48,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-08-30 06:56:48,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25910288] [2023-08-30 06:56:48,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:48,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 06:56:48,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 06:56:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 06:56:48,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 173 [2023-08-30 06:56:48,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 170 transitions, 2112 flow. Second operand has 16 states, 16 states have (on average 72.3125) internal successors, (1157), 16 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:48,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:48,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 173 [2023-08-30 06:56:48,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:49,678 INFO L130 PetriNetUnfolder]: 821/1580 cut-off events. [2023-08-30 06:56:49,679 INFO L131 PetriNetUnfolder]: For 39458/39458 co-relation queries the response was YES. [2023-08-30 06:56:49,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10806 conditions, 1580 events. 821/1580 cut-off events. For 39458/39458 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9511 event pairs, 78 based on Foata normal form. 80/1660 useless extension candidates. Maximal degree in co-relation 10760. Up to 864 conditions per place. [2023-08-30 06:56:49,699 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 209 selfloop transitions, 136 changer transitions 7/352 dead transitions. [2023-08-30 06:56:49,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 352 transitions, 4704 flow [2023-08-30 06:56:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 06:56:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 06:56:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2059 transitions. [2023-08-30 06:56:49,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44080496681652753 [2023-08-30 06:56:49,704 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2059 transitions. [2023-08-30 06:56:49,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2059 transitions. [2023-08-30 06:56:49,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:49,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2059 transitions. [2023-08-30 06:56:49,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 76.25925925925925) internal successors, (2059), 27 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:49,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 173.0) internal successors, (4844), 28 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:49,715 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 173.0) internal successors, (4844), 28 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:49,715 INFO L175 Difference]: Start difference. First operand has 130 places, 170 transitions, 2112 flow. Second operand 27 states and 2059 transitions. [2023-08-30 06:56:49,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 352 transitions, 4704 flow [2023-08-30 06:56:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 352 transitions, 4193 flow, removed 220 selfloop flow, removed 12 redundant places. [2023-08-30 06:56:49,806 INFO L231 Difference]: Finished difference. Result has 155 places, 241 transitions, 3316 flow [2023-08-30 06:56:49,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3316, PETRI_PLACES=155, PETRI_TRANSITIONS=241} [2023-08-30 06:56:49,807 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2023-08-30 06:56:49,807 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 241 transitions, 3316 flow [2023-08-30 06:56:49,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 72.3125) internal successors, (1157), 16 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:49,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:49,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:49,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:50,014 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,SelfDestructingSolverStorable14 [2023-08-30 06:56:50,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:50,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash -127571903, now seen corresponding path program 8 times [2023-08-30 06:56:50,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:50,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82804072] [2023-08-30 06:56:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82804072] [2023-08-30 06:56:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82804072] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510363508] [2023-08-30 06:56:50,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:56:50,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:50,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:50,257 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:50,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 06:56:50,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:56:50,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:50,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:56:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:50,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:50,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510363508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:50,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:50,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-30 06:56:50,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088606063] [2023-08-30 06:56:50,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:50,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:56:50,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:56:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:56:50,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-30 06:56:50,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 241 transitions, 3316 flow. Second operand has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:50,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:50,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-30 06:56:50,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:52,064 INFO L130 PetriNetUnfolder]: 823/1589 cut-off events. [2023-08-30 06:56:52,064 INFO L131 PetriNetUnfolder]: For 44844/44844 co-relation queries the response was YES. [2023-08-30 06:56:52,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11858 conditions, 1589 events. 823/1589 cut-off events. For 44844/44844 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9646 event pairs, 93 based on Foata normal form. 24/1613 useless extension candidates. Maximal degree in co-relation 11805. Up to 608 conditions per place. [2023-08-30 06:56:52,084 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 142 selfloop transitions, 160 changer transitions 1/303 dead transitions. [2023-08-30 06:56:52,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 303 transitions, 4522 flow [2023-08-30 06:56:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:56:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:56:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1170 transitions. [2023-08-30 06:56:52,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508670520231214 [2023-08-30 06:56:52,087 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1170 transitions. [2023-08-30 06:56:52,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1170 transitions. [2023-08-30 06:56:52,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:52,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1170 transitions. [2023-08-30 06:56:52,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:52,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 173.0) internal successors, (2768), 16 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:52,093 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 173.0) internal successors, (2768), 16 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:52,093 INFO L175 Difference]: Start difference. First operand has 155 places, 241 transitions, 3316 flow. Second operand 15 states and 1170 transitions. [2023-08-30 06:56:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 303 transitions, 4522 flow [2023-08-30 06:56:52,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 303 transitions, 4012 flow, removed 232 selfloop flow, removed 5 redundant places. [2023-08-30 06:56:52,212 INFO L231 Difference]: Finished difference. Result has 168 places, 260 transitions, 3620 flow [2023-08-30 06:56:52,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=2882, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3620, PETRI_PLACES=168, PETRI_TRANSITIONS=260} [2023-08-30 06:56:52,213 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 139 predicate places. [2023-08-30 06:56:52,213 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 260 transitions, 3620 flow [2023-08-30 06:56:52,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 74.14285714285714) internal successors, (1038), 14 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:52,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:52,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:52,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:52,420 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,SelfDestructingSolverStorable15 [2023-08-30 06:56:52,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:52,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1524504279, now seen corresponding path program 9 times [2023-08-30 06:56:52,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:52,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852023226] [2023-08-30 06:56:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:52,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:52,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:52,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852023226] [2023-08-30 06:56:52,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852023226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:52,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000654612] [2023-08-30 06:56:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:56:52,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:52,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:52,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 06:56:52,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 06:56:52,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:52,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:56:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:52,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:53,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000654612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:53,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:53,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 06:56:53,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328021071] [2023-08-30 06:56:53,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:53,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 06:56:53,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:53,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 06:56:53,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-30 06:56:53,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-30 06:56:53,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 260 transitions, 3620 flow. Second operand has 15 states, 15 states have (on average 73.86666666666666) internal successors, (1108), 15 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) [2023-08-30 06:56:53,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:53,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-30 06:56:53,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:54,126 INFO L130 PetriNetUnfolder]: 1004/1989 cut-off events. [2023-08-30 06:56:54,126 INFO L131 PetriNetUnfolder]: For 62073/62073 co-relation queries the response was YES. [2023-08-30 06:56:54,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15404 conditions, 1989 events. 1004/1989 cut-off events. For 62073/62073 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12996 event pairs, 144 based on Foata normal form. 24/2013 useless extension candidates. Maximal degree in co-relation 15347. Up to 924 conditions per place. [2023-08-30 06:56:54,149 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 221 selfloop transitions, 189 changer transitions 3/413 dead transitions. [2023-08-30 06:56:54,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 413 transitions, 6163 flow [2023-08-30 06:56:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 06:56:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 06:56:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1727 transitions. [2023-08-30 06:56:54,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45375722543352603 [2023-08-30 06:56:54,153 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1727 transitions. [2023-08-30 06:56:54,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1727 transitions. [2023-08-30 06:56:54,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:54,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1727 transitions. [2023-08-30 06:56:54,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.5) internal successors, (1727), 22 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:54,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 173.0) internal successors, (3979), 23 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:54,161 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 173.0) internal successors, (3979), 23 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:54,161 INFO L175 Difference]: Start difference. First operand has 168 places, 260 transitions, 3620 flow. Second operand 22 states and 1727 transitions. [2023-08-30 06:56:54,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 413 transitions, 6163 flow [2023-08-30 06:56:54,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 413 transitions, 6050 flow, removed 36 selfloop flow, removed 5 redundant places. [2023-08-30 06:56:54,357 INFO L231 Difference]: Finished difference. Result has 195 places, 315 transitions, 4944 flow [2023-08-30 06:56:54,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4944, PETRI_PLACES=195, PETRI_TRANSITIONS=315} [2023-08-30 06:56:54,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 166 predicate places. [2023-08-30 06:56:54,359 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 315 transitions, 4944 flow [2023-08-30 06:56:54,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.86666666666666) internal successors, (1108), 15 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) [2023-08-30 06:56:54,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:54,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:54,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:54,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 06:56:54,565 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:54,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1843997177, now seen corresponding path program 10 times [2023-08-30 06:56:54,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:54,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155289058] [2023-08-30 06:56:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:54,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:54,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:54,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155289058] [2023-08-30 06:56:54,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155289058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:54,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528223167] [2023-08-30 06:56:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:56:54,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:54,733 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:54,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 06:56:54,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:56:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:56:54,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:54,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:55,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528223167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:55,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:55,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 06:56:55,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278204966] [2023-08-30 06:56:55,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:55,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 06:56:55,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:55,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 06:56:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-30 06:56:55,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-30 06:56:55,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 315 transitions, 4944 flow. Second operand has 14 states, 14 states have (on average 73.78571428571429) internal successors, (1033), 14 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:55,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:55,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-30 06:56:55,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:56,240 INFO L130 PetriNetUnfolder]: 1071/2121 cut-off events. [2023-08-30 06:56:56,240 INFO L131 PetriNetUnfolder]: For 80249/80249 co-relation queries the response was YES. [2023-08-30 06:56:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18271 conditions, 2121 events. 1071/2121 cut-off events. For 80249/80249 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14029 event pairs, 91 based on Foata normal form. 18/2139 useless extension candidates. Maximal degree in co-relation 18203. Up to 890 conditions per place. [2023-08-30 06:56:56,259 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 194 selfloop transitions, 195 changer transitions 13/402 dead transitions. [2023-08-30 06:56:56,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 402 transitions, 7122 flow [2023-08-30 06:56:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 06:56:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 06:56:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1619 transitions. [2023-08-30 06:56:56,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456372144233416 [2023-08-30 06:56:56,263 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1619 transitions. [2023-08-30 06:56:56,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1619 transitions. [2023-08-30 06:56:56,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:56,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1619 transitions. [2023-08-30 06:56:56,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 77.0952380952381) internal successors, (1619), 21 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:56,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 173.0) internal successors, (3806), 22 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:56,271 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 173.0) internal successors, (3806), 22 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:56,271 INFO L175 Difference]: Start difference. First operand has 195 places, 315 transitions, 4944 flow. Second operand 21 states and 1619 transitions. [2023-08-30 06:56:56,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 402 transitions, 7122 flow [2023-08-30 06:56:56,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 402 transitions, 6886 flow, removed 71 selfloop flow, removed 7 redundant places. [2023-08-30 06:56:56,476 INFO L231 Difference]: Finished difference. Result has 216 places, 338 transitions, 6014 flow [2023-08-30 06:56:56,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6014, PETRI_PLACES=216, PETRI_TRANSITIONS=338} [2023-08-30 06:56:56,477 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2023-08-30 06:56:56,477 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 338 transitions, 6014 flow [2023-08-30 06:56:56,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.78571428571429) internal successors, (1033), 14 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:56,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:56,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:56,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:56,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 06:56:56,678 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:56,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1167349025, now seen corresponding path program 11 times [2023-08-30 06:56:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583913713] [2023-08-30 06:56:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:56,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:56,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583913713] [2023-08-30 06:56:56,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583913713] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105338294] [2023-08-30 06:56:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:56:56,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:56,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:56,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:56,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 06:56:57,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 06:56:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:56:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:56:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:56:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:56:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:56:57,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105338294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:56:57,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:56:57,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2023-08-30 06:56:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689393854] [2023-08-30 06:56:57,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:56:57,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 06:56:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:56:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 06:56:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-08-30 06:56:57,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 173 [2023-08-30 06:56:57,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 338 transitions, 6014 flow. Second operand has 13 states, 13 states have (on average 77.23076923076923) internal successors, (1004), 13 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:57,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:56:57,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 173 [2023-08-30 06:56:57,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:56:58,590 INFO L130 PetriNetUnfolder]: 1351/2669 cut-off events. [2023-08-30 06:56:58,590 INFO L131 PetriNetUnfolder]: For 128506/128507 co-relation queries the response was YES. [2023-08-30 06:56:58,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25330 conditions, 2669 events. 1351/2669 cut-off events. For 128506/128507 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18430 event pairs, 183 based on Foata normal form. 18/2687 useless extension candidates. Maximal degree in co-relation 25256. Up to 1132 conditions per place. [2023-08-30 06:56:58,624 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 286 selfloop transitions, 128 changer transitions 84/502 dead transitions. [2023-08-30 06:56:58,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 502 transitions, 10171 flow [2023-08-30 06:56:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:56:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:56:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 905 transitions. [2023-08-30 06:56:58,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47556489753021547 [2023-08-30 06:56:58,626 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 905 transitions. [2023-08-30 06:56:58,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 905 transitions. [2023-08-30 06:56:58,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:56:58,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 905 transitions. [2023-08-30 06:56:58,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 82.27272727272727) internal successors, (905), 11 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:58,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:58,630 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:58,630 INFO L175 Difference]: Start difference. First operand has 216 places, 338 transitions, 6014 flow. Second operand 11 states and 905 transitions. [2023-08-30 06:56:58,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 502 transitions, 10171 flow [2023-08-30 06:56:59,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 502 transitions, 9736 flow, removed 202 selfloop flow, removed 5 redundant places. [2023-08-30 06:56:59,206 INFO L231 Difference]: Finished difference. Result has 222 places, 358 transitions, 6730 flow [2023-08-30 06:56:59,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6730, PETRI_PLACES=222, PETRI_TRANSITIONS=358} [2023-08-30 06:56:59,208 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 193 predicate places. [2023-08-30 06:56:59,208 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 358 transitions, 6730 flow [2023-08-30 06:56:59,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 77.23076923076923) internal successors, (1004), 13 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:56:59,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:56:59,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:56:59,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:56:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:59,415 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:56:59,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:56:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1651252309, now seen corresponding path program 12 times [2023-08-30 06:56:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:56:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465591648] [2023-08-30 06:56:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:56:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:56:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:56:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:56:59,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:56:59,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465591648] [2023-08-30 06:56:59,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465591648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:56:59,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266759797] [2023-08-30 06:56:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:56:59,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:56:59,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:56:59,701 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:56:59,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 06:56:59,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 06:56:59,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:56:59,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:56:59,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:57:00,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:57:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:00,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266759797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:57:00,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:57:00,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-08-30 06:57:00,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032220052] [2023-08-30 06:57:00,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:57:00,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 06:57:00,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:57:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 06:57:00,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-30 06:57:00,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 173 [2023-08-30 06:57:00,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 358 transitions, 6730 flow. Second operand has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 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) [2023-08-30 06:57:00,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:57:00,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 173 [2023-08-30 06:57:00,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:57:03,635 INFO L130 PetriNetUnfolder]: 1194/2376 cut-off events. [2023-08-30 06:57:03,635 INFO L131 PetriNetUnfolder]: For 129941/129941 co-relation queries the response was YES. [2023-08-30 06:57:03,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23338 conditions, 2376 events. 1194/2376 cut-off events. For 129941/129941 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16119 event pairs, 105 based on Foata normal form. 46/2422 useless extension candidates. Maximal degree in co-relation 23261. Up to 1287 conditions per place. [2023-08-30 06:57:03,661 INFO L137 encePairwiseOnDemand]: 166/173 looper letters, 272 selfloop transitions, 158 changer transitions 33/463 dead transitions. [2023-08-30 06:57:03,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 463 transitions, 9376 flow [2023-08-30 06:57:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 06:57:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 06:57:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2393 transitions. [2023-08-30 06:57:03,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419162725521107 [2023-08-30 06:57:03,664 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2393 transitions. [2023-08-30 06:57:03,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2393 transitions. [2023-08-30 06:57:03,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:57:03,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2393 transitions. [2023-08-30 06:57:03,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.51515151515152) internal successors, (2393), 33 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:03,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 173.0) internal successors, (5882), 34 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:03,675 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 173.0) internal successors, (5882), 34 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:57:03,675 INFO L175 Difference]: Start difference. First operand has 222 places, 358 transitions, 6730 flow. Second operand 33 states and 2393 transitions. [2023-08-30 06:57:03,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 463 transitions, 9376 flow [2023-08-30 06:57:03,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 463 transitions, 9171 flow, removed 63 selfloop flow, removed 9 redundant places. [2023-08-30 06:57:03,995 INFO L231 Difference]: Finished difference. Result has 251 places, 381 transitions, 7726 flow [2023-08-30 06:57:03,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7726, PETRI_PLACES=251, PETRI_TRANSITIONS=381} [2023-08-30 06:57:03,996 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 222 predicate places. [2023-08-30 06:57:03,996 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 381 transitions, 7726 flow [2023-08-30 06:57:03,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 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) [2023-08-30 06:57:03,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:57:03,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:57:04,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:57:04,202 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,SelfDestructingSolverStorable19 [2023-08-30 06:57:04,202 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 06:57:04,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:57:04,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1156883011, now seen corresponding path program 13 times [2023-08-30 06:57:04,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:57:04,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855623935] [2023-08-30 06:57:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:57:04,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:57:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:04,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:57:04,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855623935] [2023-08-30 06:57:04,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855623935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:57:04,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666984308] [2023-08-30 06:57:04,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:57:04,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:57:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:57:04,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:57:04,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 06:57:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:57:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:57:04,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:57:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:57:04,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:58:55,248 WARN L222 SmtUtils]: Spent 30.75s on a formula simplification that was a NOOP. DAG size: 1206 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15